149797149 has 32 divisors (see below), whose sum is σ = 219905280. Its totient is φ = 90316800.

The previous prime is 149797139. The next prime is 149797157. The reversal of 149797149 is 941797941.

It is not a de Polignac number, because 149797149 - 2¹³ = 149788957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149797139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147957 + ... + 148965.

It is an arithmetic number, because the mean of its divisors is an integer number (6872040).

Almost surely, 2^149797149 is an apocalyptic number.

It is an amenable number.

149797149 is a deficient number, since it is larger than the sum of its proper divisors (70108131).

149797149 is a wasteful number, since it uses less digits than its factorization.

149797149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141.

The product of its digits is 571536, while the sum is 51.

The square root of 149797149 is about 12239.1645548215. The cubic root of 149797149 is about 531.0896639277.

The spelling of 149797149 in words is "one hundred forty-nine million, seven hundred ninety-seven thousand, one hundred forty-nine".