70117631 has 2 divisors, whose sum is σ = 70117632. Its totient is φ = 70117630.

The previous prime is 70117601. The next prime is 70117633. The reversal of 70117631 is 13671107.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70117631 is a prime.

It is a super-2 number, since 2×70117631² = 9832964354104322, which contains 22 as substring.

Together with 70117633, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70117631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70117633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35058815 + 35058816.

It is an arithmetic number, because the mean of its divisors is an integer number (35058816).

Almost surely, 2^70117631 is an apocalyptic number.

70117631 is a deficient number, since it is larger than the sum of its proper divisors (1).

70117631 is an equidigital number, since it uses as much as digits as its factorization.

70117631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 70117631 is about 8373.6271113538. The cubic root of 70117631 is about 412.3592536046.

Adding to 70117631 its reverse (13671107), we get a palindrome (83788738).

The spelling of 70117631 in words is "seventy million, one hundred seventeen thousand, six hundred thirty-one".