55419691 has 2 divisors, whose sum is σ = 55419692. Its totient is φ = 55419690.

The previous prime is 55419671. The next prime is 55419697. The reversal of 55419691 is 19691455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55419691 - 2⁷ = 55419563 is a prime.

It is not a weakly prime, because it can be changed into another prime (55419697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27709845 + 27709846.

It is an arithmetic number, because the mean of its divisors is an integer number (27709846).

Almost surely, 2^55419691 is an apocalyptic number.

55419691 is a deficient number, since it is larger than the sum of its proper divisors (1).

55419691 is an equidigital number, since it uses as much as digits as its factorization.

55419691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 40.

The square root of 55419691 is about 7444.4402744599. The cubic root of 55419691 is about 381.2601080900.

The spelling of 55419691 in words is "fifty-five million, four hundred nineteen thousand, six hundred ninety-one".