149415923 has 2 divisors, whose sum is σ = 149415924. Its totient is φ = 149415922.

The previous prime is 149415913. The next prime is 149415949. The reversal of 149415923 is 329514941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149415923 - 2⁸ = 149415667 is a prime.

It is not a weakly prime, because it can be changed into another prime (149415913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74707961 + 74707962.

It is an arithmetic number, because the mean of its divisors is an integer number (74707962).

Almost surely, 2^149415923 is an apocalyptic number.

149415923 is a deficient number, since it is larger than the sum of its proper divisors (1).

149415923 is an equidigital number, since it uses as much as digits as its factorization.

149415923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 149415923 is about 12223.5806128974. The cubic root of 149415923 is about 530.6387492801.

The spelling of 149415923 in words is "one hundred forty-nine million, four hundred fifteen thousand, nine hundred twenty-three".