70144631 has 2 divisors, whose sum is σ = 70144632. Its totient is φ = 70144630.

The previous prime is 70144621. The next prime is 70144639. The reversal of 70144631 is 13644107.

It is a strong prime.

It is an emirp because it is prime and its reverse (13644107) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70144631 is a prime.

It is a super-2 number, since 2×70144631² = 9840538516252322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 70144631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70144639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35072315 + 35072316.

It is an arithmetic number, because the mean of its divisors is an integer number (35072316).

Almost surely, 2^70144631 is an apocalyptic number.

70144631 is a deficient number, since it is larger than the sum of its proper divisors (1).

70144631 is an equidigital number, since it uses as much as digits as its factorization.

70144631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 70144631 is about 8375.2391607643. The cubic root of 70144631 is about 412.4121754871.

Adding to 70144631 its reverse (13644107), we get a palindrome (83788738).

The spelling of 70144631 in words is "seventy million, one hundred forty-four thousand, six hundred thirty-one".