149207738 has 4 divisors (see below), whose sum is σ = 223811610. Its totient is φ = 74603868.

The previous prime is 149207731. The next prime is 149207749. The reversal of 149207738 is 837702941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 837702941 = 23 ⋅36421867.

It can be written as a sum of positive squares in only one way, i.e., 105740089 + 43467649 = 10283^2 + 6593^2 .

It is a junction number, because it is equal to n+sod(n) for n = 149207695 and 149207704.

It is not an unprimeable number, because it can be changed into a prime (149207731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37301933 + ... + 37301936.

Almost surely, 2^149207738 is an apocalyptic number.

149207738 is a deficient number, since it is larger than the sum of its proper divisors (74603872).

149207738 is an equidigital number, since it uses as much as digits as its factorization.

149207738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74603871.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 149207738 is about 12215.0619318938. The cubic root of 149207738 is about 530.3921839143.

The spelling of 149207738 in words is "one hundred forty-nine million, two hundred seven thousand, seven hundred thirty-eight".