149607391 has 4 divisors (see below), whose sum is σ = 153650872. Its totient is φ = 145563912.

The previous prime is 149607389. The next prime is 149607413. The reversal of 149607391 is 193706941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193706941 = 31 ⋅6248611.

It is a cyclic number.

It is not a de Polignac number, because 149607391 - 2¹ = 149607389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149608391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021685 + ... + 2021758.

It is an arithmetic number, because the mean of its divisors is an integer number (38412718).

Almost surely, 2^149607391 is an apocalyptic number.

149607391 is a deficient number, since it is larger than the sum of its proper divisors (4043481).

149607391 is an equidigital number, since it uses as much as digits as its factorization.

149607391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043480.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 149607391 is about 12231.4100168378. The cubic root of 149607391 is about 530.8653136483.

The spelling of 149607391 in words is "one hundred forty-nine million, six hundred seven thousand, three hundred ninety-one".