70631 has 4 divisors (see below), whose sum is σ = 77064. Its totient is φ = 64200.

The previous prime is 70627. The next prime is 70639. The reversal of 70631 is 13607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13607 = 11 ⋅1237.

It is a cyclic number.

It is not a de Polignac number, because 70631 - 2² = 70627 is a prime.

It is a super-2 number, since 2×70631² = 9977476322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3200 + ... + 3221.

It is an arithmetic number, because the mean of its divisors is an integer number (19266).

2⁷⁰⁶³¹ is an apocalyptic number.

70631 is a deficient number, since it is larger than the sum of its proper divisors (6433).

70631 is a wasteful number, since it uses less digits than its factorization.

70631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6432.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 70631 is about 265.7649337290. The cubic root of 70631 is about 41.3363175669.

It can be divided in two parts, 706 and 31, that added together give a palindrome (737).

The spelling of 70631 in words is "seventy thousand, six hundred thirty-one".