56121707 has 2 divisors, whose sum is σ = 56121708. Its totient is φ = 56121706.

The previous prime is 56121677. The next prime is 56121731. The reversal of 56121707 is 70712165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56121707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56121707.

It is not a weakly prime, because it can be changed into another prime (56121787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28060853 + 28060854.

It is an arithmetic number, because the mean of its divisors is an integer number (28060854).

Almost surely, 2^56121707 is an apocalyptic number.

56121707 is a deficient number, since it is larger than the sum of its proper divisors (1).

56121707 is an equidigital number, since it uses as much as digits as its factorization.

56121707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 56121707 is about 7491.4422509955. The cubic root of 56121707 is about 382.8631992393.

The spelling of 56121707 in words is "fifty-six million, one hundred twenty-one thousand, seven hundred seven".