149656690 has 8 divisors (see below), whose sum is σ = 269382060. Its totient is φ = 59862672.

The previous prime is 149656687. The next prime is 149656691. The reversal of 149656690 is 96656941.

149656690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 139499721 + 10156969 = 11811^2 + 3187^2 .

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

It is a super-2 number, since 2×149656690² = 44794249723512200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 149656690.

It is not an unprimeable number, because it can be changed into a prime (149656691) 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, 7482825 + ... + 7482844.

Almost surely, 2^149656690 is an apocalyptic number.

149656690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

149656690 is a deficient number, since it is larger than the sum of its proper divisors (119725370).

149656690 is a wasteful number, since it uses less digits than its factorization.

149656690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14965676.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 149656690 is about 12233.4251131889. The cubic root of 149656690 is about 530.9236179312.

The spelling of 149656690 in words is "one hundred forty-nine million, six hundred fifty-six thousand, six hundred ninety".