720514631 has 2 divisors, whose sum is σ = 720514632. Its totient is φ = 720514630.

The previous prime is 720514577. The next prime is 720514633. The reversal of 720514631 is 136415027.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720514631 is a prime.

It is a super-2 number, since 2×720514631² = 1038282666970132322, which contains 22 as substring.

Together with 720514633, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 720514594 and 720514603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720514633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360257315 + 360257316.

It is an arithmetic number, because the mean of its divisors is an integer number (360257316).

Almost surely, 2^720514631 is an apocalyptic number.

720514631 is a deficient number, since it is larger than the sum of its proper divisors (1).

720514631 is an equidigital number, since it uses as much as digits as its factorization.

720514631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 720514631 is about 26842.4035995289. The cubic root of 720514631 is about 896.4944419544.

Adding to 720514631 its reverse (136415027), we get a palindrome (856929658).

The spelling of 720514631 in words is "seven hundred twenty million, five hundred fourteen thousand, six hundred thirty-one".