56641919 has 2 divisors, whose sum is σ = 56641920. Its totient is φ = 56641918.

The previous prime is 56641853. The next prime is 56641927. The reversal of 56641919 is 91914665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56641919 - 2¹⁶ = 56576383 is a prime.

It is a super-2 number, since 2×56641919² = 6416613976005122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56641969) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28320959 + 28320960.

It is an arithmetic number, because the mean of its divisors is an integer number (28320960).

Almost surely, 2^56641919 is an apocalyptic number.

56641919 is a deficient number, since it is larger than the sum of its proper divisors (1).

56641919 is an equidigital number, since it uses as much as digits as its factorization.

56641919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 56641919 is about 7526.0825799349. The cubic root of 56641919 is about 384.0425277516.

The spelling of 56641919 in words is "fifty-six million, six hundred forty-one thousand, nine hundred nineteen".