53979989 has 8 divisors (see below), whose sum is σ = 62472960. Its totient is φ = 45682416.

The previous prime is 53979973. The next prime is 53979997. The reversal of 53979989 is 98997935.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53979989 - 2⁴ = 53979973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53979949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48254 + ... + 49359.

It is an arithmetic number, because the mean of its divisors is an integer number (7809120).

Almost surely, 2^53979989 is an apocalyptic number.

It is an amenable number.

53979989 is a deficient number, since it is larger than the sum of its proper divisors (8492971).

53979989 is an equidigital number, since it uses as much as digits as its factorization.

53979989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97699.

The product of its digits is 5511240, while the sum is 59.

The square root of 53979989 is about 7347.1075260949. The cubic root of 53979989 is about 377.9296197923.

The spelling of 53979989 in words is "fifty-three million, nine hundred seventy-nine thousand, nine hundred eighty-nine".