56620709 has 2 divisors, whose sum is σ = 56620710. Its totient is φ = 56620708.

The previous prime is 56620699. The next prime is 56620747. The reversal of 56620709 is 90702665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36844900 + 19775809 = 6070^2 + 4447^2 .

It is a cyclic number.

It is not a de Polignac number, because 56620709 - 2⁸ = 56620453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56620769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28310354 + 28310355.

It is an arithmetic number, because the mean of its divisors is an integer number (28310355).

Almost surely, 2^56620709 is an apocalyptic number.

It is an amenable number.

56620709 is a deficient number, since it is larger than the sum of its proper divisors (1).

56620709 is an equidigital number, since it uses as much as digits as its factorization.

56620709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 56620709 is about 7524.6733483919. The cubic root of 56620709 is about 383.9945858792.

The spelling of 56620709 in words is "fifty-six million, six hundred twenty thousand, seven hundred nine".