149655791 has 2 divisors, whose sum is σ = 149655792. Its totient is φ = 149655790.

The previous prime is 149655769. The next prime is 149655797. The reversal of 149655791 is 197556941.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149655791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149655797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74827895 + 74827896.

It is an arithmetic number, because the mean of its divisors is an integer number (74827896).

Almost surely, 2^149655791 is an apocalyptic number.

149655791 is a deficient number, since it is larger than the sum of its proper divisors (1).

149655791 is an equidigital number, since it uses as much as digits as its factorization.

149655791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 47.

The square root of 149655791 is about 12233.3883695401. The cubic root of 149655791 is about 530.9225548286.

The spelling of 149655791 in words is "one hundred forty-nine million, six hundred fifty-five thousand, seven hundred ninety-one".