53915969 has 4 divisors (see below), whose sum is σ = 54227796. Its totient is φ = 53604144.

The previous prime is 53915951. The next prime is 53915971. The reversal of 53915969 is 96951935.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52128400 + 1787569 = 7220^2 + 1337^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53915969 is a prime.

It is a super-2 number, since 2×53915969² = 5813863426417922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53915569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155654 + ... + 155999.

It is an arithmetic number, because the mean of its divisors is an integer number (13556949).

Almost surely, 2^53915969 is an apocalyptic number.

It is an amenable number.

53915969 is a deficient number, since it is larger than the sum of its proper divisors (311827).

53915969 is a wasteful number, since it uses less digits than its factorization.

53915969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311826.

The product of its digits is 328050, while the sum is 47.

The square root of 53915969 is about 7342.7494169419. The cubic root of 53915969 is about 377.7801531345.

The spelling of 53915969 in words is "fifty-three million, nine hundred fifteen thousand, nine hundred sixty-nine".