70117431 has 4 divisors (see below), whose sum is σ = 93489912. Its totient is φ = 46744952.

The previous prime is 70117427. The next prime is 70117459. The reversal of 70117431 is 13471107.

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 70117431 - 2² = 70117427 is a prime.

It is a super-2 number, since 2×70117431² = 9832908260079522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70117031) 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, 11686236 + ... + 11686241.

It is an arithmetic number, because the mean of its divisors is an integer number (23372478).

Almost surely, 2^70117431 is an apocalyptic number.

70117431 is a deficient number, since it is larger than the sum of its proper divisors (23372481).

70117431 is a wasteful number, since it uses less digits than its factorization.

70117431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23372480.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 70117431 is about 8373.6151690892. The cubic root of 70117431 is about 412.3588615400.

Adding to 70117431 its reverse (13471107), we get a palindrome (83588538).

The spelling of 70117431 in words is "seventy million, one hundred seventeen thousand, four hundred thirty-one".