53978535 has 32 divisors (see below), whose sum is σ = 103346880. Its totient is φ = 26573184.

The previous prime is 53978527. The next prime is 53978543. The reversal of 53978535 is 53587935.

53978535 is a `hidden beast` number, since 539 + 7 + 85 + 35 = 666.

It is an interprime number because it is at equal distance from previous prime (53978527) and next prime (53978543).

It is not a de Polignac number, because 53978535 - 2³ = 53978527 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13624 + ... + 17133.

It is an arithmetic number, because the mean of its divisors is an integer number (3229590).

Almost surely, 2^53978535 is an apocalyptic number.

53978535 is a deficient number, since it is larger than the sum of its proper divisors (49368345).

53978535 is a wasteful number, since it uses less digits than its factorization.

53978535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30784 (or 30778 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The square root of 53978535 is about 7347.0085749235. The cubic root of 53978535 is about 377.9262264694.

The spelling of 53978535 in words is "fifty-three million, nine hundred seventy-eight thousand, five hundred thirty-five".