150636989 has 2 divisors, whose sum is σ = 150636990. Its totient is φ = 150636988.

The previous prime is 150636977. The next prime is 150637009. The reversal of 150636989 is 989636051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128074489 + 22562500 = 11317^2 + 4750^2 .

It is a cyclic number.

It is not a de Polignac number, because 150636989 - 2²⁴ = 133859773 is a prime.

It is a super-2 number, since 2×150636989² = 45383004909972242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (150636929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75318494 + 75318495.

It is an arithmetic number, because the mean of its divisors is an integer number (75318495).

Almost surely, 2^150636989 is an apocalyptic number.

It is an amenable number.

150636989 is a deficient number, since it is larger than the sum of its proper divisors (1).

150636989 is an equidigital number, since it uses as much as digits as its factorization.

150636989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 150636989 is about 12273.4261312805. The cubic root of 150636989 is about 532.0803355890.

The spelling of 150636989 in words is "one hundred fifty million, six hundred thirty-six thousand, nine hundred eighty-nine".