134720631 has 48 divisors (see below), whose sum is σ = 219492000. Its totient is φ = 81381888.

The previous prime is 134720623. The next prime is 134720639. The reversal of 134720631 is 136027431.

134720631 is a `hidden beast` number, since 1 + 3 + 4 + 7 + 20 + 631 = 666.

134720631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (134720623) and next prime (134720639).

It is not a de Polignac number, because 134720631 - 2³ = 134720623 is a prime.

It is a super-2 number, since 2×134720631² = 36299296834076322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 134720595 and 134720604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134720639) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 385845 + ... + 386193.

It is an arithmetic number, because the mean of its divisors is an integer number (4572750).

Almost surely, 2^134720631 is an apocalyptic number.

134720631 is a deficient number, since it is larger than the sum of its proper divisors (84771369).

134720631 is a wasteful number, since it uses less digits than its factorization.

134720631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 134720631 is about 11606.9216849258. The cubic root of 134720631 is about 512.6386772053.

The spelling of 134720631 in words is "one hundred thirty-four million, seven hundred twenty thousand, six hundred thirty-one".