56121943 has 2 divisors, whose sum is σ = 56121944. Its totient is φ = 56121942.

The previous prime is 56121937. The next prime is 56121959. The reversal of 56121943 is 34912165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56121943 - 2²¹ = 54024791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56121973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28060971 + 28060972.

It is an arithmetic number, because the mean of its divisors is an integer number (28060972).

Almost surely, 2^56121943 is an apocalyptic number.

56121943 is a deficient number, since it is larger than the sum of its proper divisors (1).

56121943 is an equidigital number, since it uses as much as digits as its factorization.

56121943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 56121943 is about 7491.4580022850. The cubic root of 56121943 is about 382.8637359039.

The spelling of 56121943 in words is "fifty-six million, one hundred twenty-one thousand, nine hundred forty-three".