53907691 has 2 divisors, whose sum is σ = 53907692. Its totient is φ = 53907690.

The previous prime is 53907683. The next prime is 53907739. The reversal of 53907691 is 19670935.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53907691 - 2³ = 53907683 is a prime.

It is not a weakly prime, because it can be changed into another prime (53907611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26953845 + 26953846.

It is an arithmetic number, because the mean of its divisors is an integer number (26953846).

Almost surely, 2^53907691 is an apocalyptic number.

53907691 is a deficient number, since it is larger than the sum of its proper divisors (1).

53907691 is an equidigital number, since it uses as much as digits as its factorization.

53907691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 53907691 is about 7342.1857099913. The cubic root of 53907691 is about 377.7608179590.

The spelling of 53907691 in words is "fifty-three million, nine hundred seven thousand, six hundred ninety-one".