149691898 has 16 divisors (see below), whose sum is σ = 231600384. Its totient is φ = 72523600.

The previous prime is 149691877. The next prime is 149691907. The reversal of 149691898 is 898196941.

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, 1611 + ... + 17377.

It is an arithmetic number, because the mean of its divisors is an integer number (14475024).

Almost surely, 2^149691898 is an apocalyptic number.

149691898 is a deficient number, since it is larger than the sum of its proper divisors (81908486).

149691898 is a wasteful number, since it uses less digits than its factorization.

149691898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15917.

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

The square root of 149691898 is about 12234.8640368416. The cubic root of 149691898 is about 530.9652494214.

The spelling of 149691898 in words is "one hundred forty-nine million, six hundred ninety-one thousand, eight hundred ninety-eight".