149497921 has 2 divisors, whose sum is σ = 149497922. Its totient is φ = 149497920.

The previous prime is 149497919. The next prime is 149497927. The reversal of 149497921 is 129794941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75881521 + 73616400 = 8711^2 + 8580^2 .

It is a cyclic number.

It is not a de Polignac number, because 149497921 - 2¹ = 149497919 is a prime.

Together with 149497919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (149497927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74748960 + 74748961.

It is an arithmetic number, because the mean of its divisors is an integer number (74748961).

Almost surely, 2^149497921 is an apocalyptic number.

It is an amenable number.

149497921 is a deficient number, since it is larger than the sum of its proper divisors (1).

149497921 is an equidigital number, since it uses as much as digits as its factorization.

149497921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 46.

The square root of 149497921 is about 12226.9342437097. The cubic root of 149497921 is about 530.7358013171.

The spelling of 149497921 in words is "one hundred forty-nine million, four hundred ninety-seven thousand, nine hundred twenty-one".