149209090 has 16 divisors (see below), whose sum is σ = 282712320. Its totient is φ = 56542320.

The previous prime is 149209087. The next prime is 149209091. The reversal of 149209090 is 90902941.

It is not an unprimeable number, because it can be changed into a prime (149209091) 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, 392466 + ... + 392845.

It is an arithmetic number, because the mean of its divisors is an integer number (17669520).

Almost surely, 2^149209090 is an apocalyptic number.

149209090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

149209090 is a deficient number, since it is larger than the sum of its proper divisors (133503230).

149209090 is a wasteful number, since it uses less digits than its factorization.

149209090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785337.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 149209090 is about 12215.1172732807. The cubic root of 149209090 is about 530.3937859047.

The spelling of 149209090 in words is "one hundred forty-nine million, two hundred nine thousand, ninety".