149657906 has 4 divisors (see below), whose sum is σ = 224486862. Its totient is φ = 74828952.

The previous prime is 149657899. The next prime is 149657909. The reversal of 149657906 is 609756941.

149657906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 142683025 + 6974881 = 11945^2 + 2641^2 .

It is not an unprimeable number, because it can be changed into a prime (149657909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37414475 + ... + 37414478.

Almost surely, 2^149657906 is an apocalyptic number.

149657906 is a deficient number, since it is larger than the sum of its proper divisors (74828956).

149657906 is an equidigital number, since it uses as much as digits as its factorization.

149657906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74828955.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 149657906 is about 12233.4748129875. The cubic root of 149657906 is about 530.9250558921.

The spelling of 149657906 in words is "one hundred forty-nine million, six hundred fifty-seven thousand, nine hundred six".