128992037 has 2 divisors, whose sum is σ = 128992038. Its totient is φ = 128992036.

The previous prime is 128992021. The next prime is 128992051. The reversal of 128992037 is 730299821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127554436 + 1437601 = 11294^2 + 1199^2 .

It is a cyclic number.

It is not a de Polignac number, because 128992037 - 2⁴ = 128992021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128991985 and 128992003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128992057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64496018 + 64496019.

It is an arithmetic number, because the mean of its divisors is an integer number (64496019).

Almost surely, 2^128992037 is an apocalyptic number.

It is an amenable number.

128992037 is a deficient number, since it is larger than the sum of its proper divisors (1).

128992037 is an equidigital number, since it uses as much as digits as its factorization.

128992037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 128992037 is about 11357.4661346623. The cubic root of 128992037 is about 505.2670378035.

The spelling of 128992037 in words is "one hundred twenty-eight million, nine hundred ninety-two thousand, thirty-seven".