149997929 has 2 divisors, whose sum is σ = 149997930. Its totient is φ = 149997928.

The previous prime is 149997923. The next prime is 149997931. The reversal of 149997929 is 929799941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142157929 + 7840000 = 11923^2 + 2800^2 .

It is a cyclic number.

It is not a de Polignac number, because 149997929 - 2²⁴ = 133220713 is a prime.

Together with 149997931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149997923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74998964 + 74998965.

It is an arithmetic number, because the mean of its divisors is an integer number (74998965).

Almost surely, 2^149997929 is an apocalyptic number.

It is an amenable number.

149997929 is a deficient number, since it is larger than the sum of its proper divisors (1).

149997929 is an equidigital number, since it uses as much as digits as its factorization.

149997929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3306744, while the sum is 59.

The square root of 149997929 is about 12247.3641654031. The cubic root of 149997929 is about 531.3268392846.

The spelling of 149997929 in words is "one hundred forty-nine million, nine hundred ninety-seven thousand, nine hundred twenty-nine".