149209491 has 8 divisors (see below), whose sum is σ = 199137744. Its totient is φ = 99377120.

The previous prime is 149209481. The next prime is 149209507. The reversal of 149209491 is 194902941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149209491 - 2⁶ = 149209427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149209471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20256 + ... + 26621.

It is an arithmetic number, because the mean of its divisors is an integer number (24892218).

Almost surely, 2^149209491 is an apocalyptic number.

149209491 is a deficient number, since it is larger than the sum of its proper divisors (49928253).

149209491 is a wasteful number, since it uses less digits than its factorization.

149209491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47941.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 149209491 is about 12215.1336873568. The cubic root of 149209491 is about 530.3942610494.

The spelling of 149209491 in words is "one hundred forty-nine million, two hundred nine thousand, four hundred ninety-one".