149797139 has 2 divisors, whose sum is σ = 149797140. Its totient is φ = 149797138.

The previous prime is 149797099. The next prime is 149797157. The reversal of 149797139 is 931797941.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149797139 - 2⁸ = 149796883 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (149797339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74898569 + 74898570.

It is an arithmetic number, because the mean of its divisors is an integer number (74898570).

Almost surely, 2^149797139 is an apocalyptic number.

149797139 is a deficient number, since it is larger than the sum of its proper divisors (1).

149797139 is an equidigital number, since it uses as much as digits as its factorization.

149797139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 50.

The square root of 149797139 is about 12239.1641462969. The cubic root of 149797139 is about 531.0896521097.

The spelling of 149797139 in words is "one hundred forty-nine million, seven hundred ninety-seven thousand, one hundred thirty-nine".