629721423 has 6 divisors (see below), whose sum is σ = 909597624. Its totient is φ = 419814276.

The previous prime is 629721413. The next prime is 629721437. The reversal of 629721423 is 324127926.

629721423 is a `hidden beast` number, since 629 + 7 + 2 + 1 + 4 + 23 = 666.

It is not a de Polignac number, because 629721423 - 2⁶ = 629721359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629721413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34984515 + ... + 34984532.

It is an arithmetic number, because the mean of its divisors is an integer number (151599604).

Almost surely, 2^629721423 is an apocalyptic number.

629721423 is a deficient number, since it is larger than the sum of its proper divisors (279876201).

629721423 is a wasteful number, since it uses less digits than its factorization.

629721423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69969053 (or 69969050 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 629721423 is about 25094.2507957500. The cubic root of 629721423 is about 857.1355132823.

The spelling of 629721423 in words is "six hundred twenty-nine million, seven hundred twenty-one thousand, four hundred twenty-three".