53951609 has 2 divisors, whose sum is σ = 53951610. Its totient is φ = 53951608.

The previous prime is 53951593. The next prime is 53951617. The reversal of 53951609 is 90615935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52606009 + 1345600 = 7253^2 + 1160^2 .

It is a cyclic number.

It is not a de Polignac number, because 53951609 - 2⁴ = 53951593 is a prime.

It is a super-2 number, since 2×53951609² = 5821552227377762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53951669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26975804 + 26975805.

It is an arithmetic number, because the mean of its divisors is an integer number (26975805).

Almost surely, 2^53951609 is an apocalyptic number.

It is an amenable number.

53951609 is a deficient number, since it is larger than the sum of its proper divisors (1).

53951609 is an equidigital number, since it uses as much as digits as its factorization.

53951609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 53951609 is about 7345.1758998679. The cubic root of 53951609 is about 377.8633759674.

The spelling of 53951609 in words is "fifty-three million, nine hundred fifty-one thousand, six hundred nine".