53891697 has 16 divisors (see below), whose sum is σ = 72832320. Its totient is φ = 35443200.

The previous prime is 53891693. The next prime is 53891707. The reversal of 53891697 is 79619835.

53891697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53891697 - 2² = 53891693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53891693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94429 + ... + 94997.

It is an arithmetic number, because the mean of its divisors is an integer number (4552020).

Almost surely, 2^53891697 is an apocalyptic number.

It is an amenable number.

53891697 is a deficient number, since it is larger than the sum of its proper divisors (18940623).

53891697 is a wasteful number, since it uses less digits than its factorization.

53891697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944.

The product of its digits is 408240, while the sum is 48.

The square root of 53891697 is about 7341.0964439925. The cubic root of 53891697 is about 377.7234546809.

It can be divided in two parts, 538 and 91697, that added together give a triangular number (92235 = T₄₂₉).

The spelling of 53891697 in words is "fifty-three million, eight hundred ninety-one thousand, six hundred ninety-seven".