149315906 has 4 divisors (see below), whose sum is σ = 223973862. Its totient is φ = 74657952.

The previous prime is 149315899. The next prime is 149315917. The reversal of 149315906 is 609513941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 609513941 = 67 ⋅9097223.

It can be written as a sum of positive squares in only one way, i.e., 114682681 + 34633225 = 10709^2 + 5885^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 149315906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37328975 + ... + 37328978.

Almost surely, 2^149315906 is an apocalyptic number.

149315906 is a deficient number, since it is larger than the sum of its proper divisors (74657956).

149315906 is an equidigital number, since it uses as much as digits as its factorization.

149315906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74657955.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 149315906 is about 12219.4887781773. The cubic root of 149315906 is about 530.5203220487.

The spelling of 149315906 in words is "one hundred forty-nine million, three hundred fifteen thousand, nine hundred six".