149373978 has 16 divisors (see below), whose sum is σ = 321728736. Its totient is φ = 45961200.

The previous prime is 149373907. The next prime is 149373997. The reversal of 149373978 is 879373941.

149373978 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 149373978.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 957448 + ... + 957603.

It is an arithmetic number, because the mean of its divisors is an integer number (20108046).

Almost surely, 2^149373978 is an apocalyptic number.

149373978 is an abundant number, since it is smaller than the sum of its proper divisors (172354758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

149373978 is a wasteful number, since it uses less digits than its factorization.

149373978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915069.

The product of its digits is 1143072, while the sum is 51.

The square root of 149373978 is about 12221.8647513381. The cubic root of 149373978 is about 530.5890898574.

It can be divided in two parts, 14937 and 3978, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 149373978 in words is "one hundred forty-nine million, three hundred seventy-three thousand, nine hundred seventy-eight".