53780979 has 24 divisors (see below), whose sum is σ = 88326288. Its totient is φ = 28922880.

The previous prime is 53780959. The next prime is 53780983. The reversal of 53780979 is 97908735.

It is not a de Polignac number, because 53780979 - 2⁷ = 53780851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53780959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8262 + ... + 13259.

It is an arithmetic number, because the mean of its divisors is an integer number (3680262).

Almost surely, 2^53780979 is an apocalyptic number.

53780979 is a deficient number, since it is larger than the sum of its proper divisors (34545309).

53780979 is a wasteful number, since it uses less digits than its factorization.

53780979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21555 (or 21548 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 48.

The square root of 53780979 is about 7333.5515952368. The cubic root of 53780979 is about 377.4646055437.

The spelling of 53780979 in words is "fifty-three million, seven hundred eighty thousand, nine hundred seventy-nine".