53969697 has 6 divisors (see below), whose sum is σ = 77956242. Its totient is φ = 35979792.

The previous prime is 53969693. The next prime is 53969701. The reversal of 53969697 is 79696935.

It is an interprime number because it is at equal distance from previous prime (53969693) and next prime (53969701).

It can be written as a sum of positive squares in only one way, i.e., 34468641 + 19501056 = 5871^2 + 4416^2 .

It is not a de Polignac number, because 53969697 - 2² = 53969693 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53969693) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2998308 + ... + 2998325.

It is an arithmetic number, because the mean of its divisors is an integer number (12992707).

Almost surely, 2^53969697 is an apocalyptic number.

It is an amenable number.

53969697 is a deficient number, since it is larger than the sum of its proper divisors (23986545).

53969697 is a wasteful number, since it uses less digits than its factorization.

53969697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996639 (or 5996636 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 54.

The square root of 53969697 is about 7346.4070810159. The cubic root of 53969697 is about 377.9055991694.

The spelling of 53969697 in words is "fifty-three million, nine hundred sixty-nine thousand, six hundred ninety-seven".