149731690 has 16 divisors (see below), whose sum is σ = 271576800. Its totient is φ = 59434960.

The previous prime is 149731661. The next prime is 149731691. The reversal of 149731690 is 96137941.

It is a super-2 number, since 2×149731690² = 44839157980512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149731691) 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, 55840 + ... + 58459.

It is an arithmetic number, because the mean of its divisors is an integer number (16973550).

Almost surely, 2^149731690 is an apocalyptic number.

149731690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

149731690 is a deficient number, since it is larger than the sum of its proper divisors (121845110).

149731690 is a wasteful number, since it uses less digits than its factorization.

149731690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114437.

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

The square root of 149731690 is about 12236.4901013322. The cubic root of 149731690 is about 531.0122933778.

The spelling of 149731690 in words is "one hundred forty-nine million, seven hundred thirty-one thousand, six hundred ninety".