149988961 has 4 divisors (see below), whose sum is σ = 150165652. Its totient is φ = 149812272.

The previous prime is 149988953. The next prime is 149988967. The reversal of 149988961 is 169889941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2512225 + 147476736 = 1585^2 + 12144^2 .

It is a cyclic number.

It is not a de Polignac number, because 149988961 - 2³ = 149988953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149988967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87066 + ... + 88771.

It is an arithmetic number, because the mean of its divisors is an integer number (37541413).

Almost surely, 2^149988961 is an apocalyptic number.

It is an amenable number.

149988961 is a deficient number, since it is larger than the sum of its proper divisors (176691).

149988961 is an equidigital number, since it uses as much as digits as its factorization.

149988961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176690.

The product of its digits is 1119744, while the sum is 55.

The square root of 149988961 is about 12246.9980403363. The cubic root of 149988961 is about 531.3162501738.

The spelling of 149988961 in words is "one hundred forty-nine million, nine hundred eighty-eight thousand, nine hundred sixty-one".