53407979 has 2 divisors, whose sum is σ = 53407980. Its totient is φ = 53407978.

The previous prime is 53407973. The next prime is 53407997. The reversal of 53407979 is 97970435.

It is a happy number.

Together with next prime (53407997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53407979 is a prime.

It is not a weakly prime, because it can be changed into another prime (53407973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26703989 + 26703990.

It is an arithmetic number, because the mean of its divisors is an integer number (26703990).

Almost surely, 2^53407979 is an apocalyptic number.

53407979 is a deficient number, since it is larger than the sum of its proper divisors (1).

53407979 is an equidigital number, since it uses as much as digits as its factorization.

53407979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 53407979 is about 7308.0762858635. The cubic root of 53407979 is about 376.5899403418.

The spelling of 53407979 in words is "fifty-three million, four hundred seven thousand, nine hundred seventy-nine".