149975869 has 2 divisors, whose sum is σ = 149975870. Its totient is φ = 149975868.

The previous prime is 149975851. The next prime is 149975897. The reversal of 149975869 is 968579941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108951844 + 41024025 = 10438^2 + 6405^2 .

It is a cyclic number.

It is not a de Polignac number, because 149975869 - 2⁷ = 149975741 is a prime.

It is a super-2 number, since 2×149975869² = 44985522564610322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149975669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74987934 + 74987935.

It is an arithmetic number, because the mean of its divisors is an integer number (74987935).

Almost surely, 2^149975869 is an apocalyptic number.

It is an amenable number.

149975869 is a deficient number, since it is larger than the sum of its proper divisors (1).

149975869 is an equidigital number, since it uses as much as digits as its factorization.

149975869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 58.

The square root of 149975869 is about 12246.4635303421. The cubic root of 149975869 is about 531.3007908256.

The spelling of 149975869 in words is "one hundred forty-nine million, nine hundred seventy-five thousand, eight hundred sixty-nine".