149639193 has 72 divisors (see below), whose sum is σ = 256763520. Its totient is φ = 83229120.

The previous prime is 149639071. The next prime is 149639197. The reversal of 149639193 is 391936941.

149639193 is a `hidden beast` number, since 1 + 4 + 9 + 639 + 1 + 9 + 3 = 666.

It is not a de Polignac number, because 149639193 - 2⁹ = 149638681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149639197) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1894128 + ... + 1894206.

It is an arithmetic number, because the mean of its divisors is an integer number (3566160).

Almost surely, 2^149639193 is an apocalyptic number.

It is an amenable number.

149639193 is a deficient number, since it is larger than the sum of its proper divisors (107124327).

149639193 is a wasteful number, since it uses less digits than its factorization.

149639193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 165 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 149639193 is about 12232.7099614108. The cubic root of 149639193 is about 530.9029262789.

The spelling of 149639193 in words is "one hundred forty-nine million, six hundred thirty-nine thousand, one hundred ninety-three".