70703731 has 16 divisors (see below), whose sum is σ = 90063360. Its totient is φ = 54034560.

The previous prime is 70703729. The next prime is 70703741. The reversal of 70703731 is 13730707.

It is a cyclic number.

It is not a de Polignac number, because 70703731 - 2¹ = 70703729 is a prime.

It is a super-2 number, since 2×70703731² = 9998035154640722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70703731.

It is not an unprimeable number, because it can be changed into a prime (70703701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13375 + ... + 17896.

It is an arithmetic number, because the mean of its divisors is an integer number (5628960).

Almost surely, 2^70703731 is an apocalyptic number.

70703731 is a deficient number, since it is larger than the sum of its proper divisors (19359629).

70703731 is a wasteful number, since it uses less digits than its factorization.

70703731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31314.

The product of its (nonzero) digits is 3087, while the sum is 28.

The square root of 70703731 is about 8408.5510642441. The cubic root of 70703731 is about 413.5050114244.

It can be divided in two parts, 7070 and 3731, that added together give a palindrome (10801).

The spelling of 70703731 in words is "seventy million, seven hundred three thousand, seven hundred thirty-one".