700405631 has 2 divisors, whose sum is σ = 700405632. Its totient is φ = 700405630.

The previous prime is 700405577. The next prime is 700405639. The reversal of 700405631 is 136504007.

It is a strong prime.

It is an emirp because it is prime and its reverse (136504007) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-700405631 is a prime.

It is a super-2 number, since 2×700405631² = 981136095873016322, which contains 22 as substring.

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 700405631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (700405639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350202815 + 350202816.

It is an arithmetic number, because the mean of its divisors is an integer number (350202816).

Almost surely, 2^700405631 is an apocalyptic number.

700405631 is a deficient number, since it is larger than the sum of its proper divisors (1).

700405631 is an equidigital number, since it uses as much as digits as its factorization.

700405631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 700405631 is about 26465.1777058081. The cubic root of 700405631 is about 888.0754740486.

Adding to 700405631 its reverse (136504007), we get a palindrome (836909638).

The spelling of 700405631 in words is "seven hundred million, four hundred five thousand, six hundred thirty-one".