149888861 has 4 divisors (see below), whose sum is σ = 156405792. Its totient is φ = 143371932.

The previous prime is 149888857. The next prime is 149888863. The reversal of 149888861 is 168888941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 168888941 = 13 ⋅12991457.

It is a cyclic number.

It is not a de Polignac number, because 149888861 - 2² = 149888857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149888863) 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, 3258431 + ... + 3258476.

It is an arithmetic number, because the mean of its divisors is an integer number (39101448).

Almost surely, 2^149888861 is an apocalyptic number.

It is an amenable number.

149888861 is a deficient number, since it is larger than the sum of its proper divisors (6516931).

149888861 is an equidigital number, since it uses as much as digits as its factorization.

149888861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6516930.

The product of its digits is 884736, while the sum is 53.

The square root of 149888861 is about 12242.9106424902. The cubic root of 149888861 is about 531.1980268233.

The spelling of 149888861 in words is "one hundred forty-nine million, eight hundred eighty-eight thousand, eight hundred sixty-one".