53121979 has 2 divisors, whose sum is σ = 53121980. Its totient is φ = 53121978.

The previous prime is 53121977. The next prime is 53121983. The reversal of 53121979 is 97912135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53121979 - 2¹ = 53121977 is a prime.

Together with 53121977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (53121977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26560989 + 26560990.

It is an arithmetic number, because the mean of its divisors is an integer number (26560990).

Almost surely, 2^53121979 is an apocalyptic number.

53121979 is a deficient number, since it is larger than the sum of its proper divisors (1).

53121979 is an equidigital number, since it uses as much as digits as its factorization.

53121979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 37.

The square root of 53121979 is about 7288.4826267201. The cubic root of 53121979 is about 375.9165231728.

The spelling of 53121979 in words is "fifty-three million, one hundred twenty-one thousand, nine hundred seventy-nine".