149537391 has 12 divisors (see below), whose sum is σ = 210430872. Its totient is φ = 94443984.

The previous prime is 149537383. The next prime is 149537407. The reversal of 149537391 is 193735941.

It is not a de Polignac number, because 149537391 - 2³ = 149537383 is a prime.

It is a super-2 number, since 2×149537391² = 44722862614173762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149537351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67956 + ... + 70121.

It is an arithmetic number, because the mean of its divisors is an integer number (17535906).

Almost surely, 2^149537391 is an apocalyptic number.

149537391 is a deficient number, since it is larger than the sum of its proper divisors (60893481).

149537391 is a wasteful number, since it uses less digits than its factorization.

149537391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138118 (or 138099 counting only the distinct ones).

The product of its digits is 102060, while the sum is 42.

The square root of 149537391 is about 12228.5481967403. The cubic root of 149537391 is about 530.7825049739.

The spelling of 149537391 in words is "one hundred forty-nine million, five hundred thirty-seven thousand, three hundred ninety-one".