70472731 has 12 divisors (see below), whose sum is σ = 82829208. Its totient is φ = 59778432.

The previous prime is 70472719. The next prime is 70472749. The reversal of 70472731 is 13727407.

It is not a de Polignac number, because 70472731 - 2¹¹ = 70470683 is a prime.

It is a super-2 number, since 2×70472731² = 9932811629196722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70472693 and 70472702.

It is not an unprimeable number, because it can be changed into a prime (70472711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2661 + ... + 12166.

It is an arithmetic number, because the mean of its divisors is an integer number (6902434).

Almost surely, 2^70472731 is an apocalyptic number.

70472731 is a deficient number, since it is larger than the sum of its proper divisors (12356477).

70472731 is a wasteful number, since it uses less digits than its factorization.

70472731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14938 (or 14931 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 70472731 is about 8394.8038095003. The cubic root of 70472731 is about 413.0541918739.

The spelling of 70472731 in words is "seventy million, four hundred seventy-two thousand, seven hundred thirty-one".