53989961 has 2 divisors, whose sum is σ = 53989962. Its totient is φ = 53989960.

The previous prime is 53989939. The next prime is 53989973. The reversal of 53989961 is 16998935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30525625 + 23464336 = 5525^2 + 4844^2 .

It is a cyclic number.

It is not a de Polignac number, because 53989961 - 2²² = 49795657 is a prime.

It is not a weakly prime, because it can be changed into another prime (53989921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26994980 + 26994981.

It is an arithmetic number, because the mean of its divisors is an integer number (26994981).

Almost surely, 2^53989961 is an apocalyptic number.

It is an amenable number.

53989961 is a deficient number, since it is larger than the sum of its proper divisors (1).

53989961 is an equidigital number, since it uses as much as digits as its factorization.

53989961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 50.

The square root of 53989961 is about 7347.7861291684. The cubic root of 53989961 is about 377.9528906512.

The spelling of 53989961 in words is "fifty-three million, nine hundred eighty-nine thousand, nine hundred sixty-one".