149933491 has 2 divisors, whose sum is σ = 149933492. Its totient is φ = 149933490.

The previous prime is 149933479. The next prime is 149933501. The reversal of 149933491 is 194339941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149933491 - 2⁷ = 149933363 is a prime.

It is not a weakly prime, because it can be changed into another prime (149933461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74966745 + 74966746.

It is an arithmetic number, because the mean of its divisors is an integer number (74966746).

Almost surely, 2^149933491 is an apocalyptic number.

149933491 is the 7070-th hex number.

149933491 is a deficient number, since it is larger than the sum of its proper divisors (1).

149933491 is an equidigital number, since it uses as much as digits as its factorization.

149933491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 43.

The square root of 149933491 is about 12244.7331943166. The cubic root of 149933491 is about 531.2507436945.

The spelling of 149933491 in words is "one hundred forty-nine million, nine hundred thirty-three thousand, four hundred ninety-one".