149971497 has 16 divisors (see below), whose sum is σ = 217768320. Its totient is φ = 91251072.

The previous prime is 149971469. The next prime is 149971513. The reversal of 149971497 is 794179941.

It is not a de Polignac number, because 149971497 - 2²⁷ = 15753769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149971447) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 18133 + ... + 25074.

It is an arithmetic number, because the mean of its divisors is an integer number (13610520).

Almost surely, 2^149971497 is an apocalyptic number.

It is an amenable number.

149971497 is a deficient number, since it is larger than the sum of its proper divisors (67796823).

149971497 is a wasteful number, since it uses less digits than its factorization.

149971497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43312.

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

The square root of 149971497 is about 12246.2850285301. The cubic root of 149971497 is about 531.2956280625.

The spelling of 149971497 in words is "one hundred forty-nine million, nine hundred seventy-one thousand, four hundred ninety-seven".