56904191 has 2 divisors, whose sum is σ = 56904192. Its totient is φ = 56904190.

The previous prime is 56904181. The next prime is 56904217. The reversal of 56904191 is 19140965.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56904191 is a 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 (56904131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28452095 + 28452096.

It is an arithmetic number, because the mean of its divisors is an integer number (28452096).

Almost surely, 2^56904191 is an apocalyptic number.

56904191 is a deficient number, since it is larger than the sum of its proper divisors (1).

56904191 is an equidigital number, since it uses as much as digits as its factorization.

56904191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 56904191 is about 7543.4866606895. The cubic root of 56904191 is about 384.6343658602.

The spelling of 56904191 in words is "fifty-six million, nine hundred four thousand, one hundred ninety-one".