53207989 has 2 divisors, whose sum is σ = 53207990. Its totient is φ = 53207988.

The previous prime is 53207981. The next prime is 53208007. The reversal of 53207989 is 98970235.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52272900 + 935089 = 7230^2 + 967^2 .

It is a cyclic number.

It is not a de Polignac number, because 53207989 - 2³ = 53207981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53207981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26603994 + 26603995.

It is an arithmetic number, because the mean of its divisors is an integer number (26603995).

Almost surely, 2^53207989 is an apocalyptic number.

It is an amenable number.

53207989 is a deficient number, since it is larger than the sum of its proper divisors (1).

53207989 is an equidigital number, since it uses as much as digits as its factorization.

53207989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 53207989 is about 7294.3806454010. The cubic root of 53207989 is about 376.1192964035.

The spelling of 53207989 in words is "fifty-three million, two hundred seven thousand, nine hundred eighty-nine".