70423431 has 8 divisors (see below), whose sum is σ = 101120880. Its totient is φ = 43337472.

The previous prime is 70423421. The next prime is 70423439. The reversal of 70423431 is 13432407.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70423431 - 2²⁵ = 36868999 is a prime.

It is a super-2 number, since 2×70423431² = 9918919267623522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70423439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 902826 + ... + 902903.

It is an arithmetic number, because the mean of its divisors is an integer number (12640110).

Almost surely, 2^70423431 is an apocalyptic number.

70423431 is a deficient number, since it is larger than the sum of its proper divisors (30697449).

70423431 is a wasteful number, since it uses less digits than its factorization.

70423431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805745.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 70423431 is about 8391.8669555707. The cubic root of 70423431 is about 412.9578504865.

Adding to 70423431 its reverse (13432407), we get a palindrome (83855838).

The spelling of 70423431 in words is "seventy million, four hundred twenty-three thousand, four hundred thirty-one".