149999878 has 12 divisors (see below), whose sum is σ = 261734652. Its totient is φ = 64285620.

The previous prime is 149999869. The next prime is 149999879. The reversal of 149999878 is 878999941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149999879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 765208 + ... + 765403.

It is an arithmetic number, because the mean of its divisors is an integer number (21811221).

Almost surely, 2^149999878 is an apocalyptic number.

149999878 is a deficient number, since it is larger than the sum of its proper divisors (111734774).

149999878 is a wasteful number, since it uses less digits than its factorization.

149999878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530627 (or 1530620 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 64.

The square root of 149999878 is about 12247.4437332857. The cubic root of 149999878 is about 531.3291405420.

The spelling of 149999878 in words is "one hundred forty-nine million, nine hundred ninety-nine thousand, eight hundred seventy-eight".