70313731 has 4 divisors (see below), whose sum is σ = 70402752. Its totient is φ = 70224712.

The previous prime is 70313723. The next prime is 70313741. The reversal of 70313731 is 13731307.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70313731 - 2³ = 70313723 is a prime.

It is a super-2 number, since 2×70313731² = 9888041534280722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70313696 and 70313705.

It is not an unprimeable number, because it can be changed into a prime (70313701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43315 + ... + 44908.

It is an arithmetic number, because the mean of its divisors is an integer number (17600688).

Almost surely, 2^70313731 is an apocalyptic number.

70313731 is a deficient number, since it is larger than the sum of its proper divisors (89021).

70313731 is an equidigital number, since it uses as much as digits as its factorization.

70313731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89020.

The product of its (nonzero) digits is 1323, while the sum is 25.

The square root of 70313731 is about 8385.3283179611. The cubic root of 70313731 is about 412.7433147926.

The spelling of 70313731 in words is "seventy million, three hundred thirteen thousand, seven hundred thirty-one".