56690191 has 2 divisors, whose sum is σ = 56690192. Its totient is φ = 56690190.

The previous prime is 56690149. The next prime is 56690201. The reversal of 56690191 is 19109665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56690191 - 2¹¹ = 56688143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56690191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56690111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28345095 + 28345096.

It is an arithmetic number, because the mean of its divisors is an integer number (28345096).

Almost surely, 2^56690191 is an apocalyptic number.

56690191 is a deficient number, since it is larger than the sum of its proper divisors (1).

56690191 is an equidigital number, since it uses as much as digits as its factorization.

56690191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 56690191 is about 7529.2888774439. The cubic root of 56690191 is about 384.1515944249.

The spelling of 56690191 in words is "fifty-six million, six hundred ninety thousand, one hundred ninety-one".