149523961 has 2 divisors, whose sum is σ = 149523962. Its totient is φ = 149523960.

The previous prime is 149523949. The next prime is 149523991. The reversal of 149523961 is 169325941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147768336 + 1755625 = 12156^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 149523961 - 2¹¹ = 149521913 is a prime.

It is not a weakly prime, because it can be changed into another prime (149523931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74761980 + 74761981.

It is an arithmetic number, because the mean of its divisors is an integer number (74761981).

Almost surely, 2^149523961 is an apocalyptic number.

It is an amenable number.

149523961 is a deficient number, since it is larger than the sum of its proper divisors (1).

149523961 is an equidigital number, since it uses as much as digits as its factorization.

149523961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 149523961 is about 12227.9990595355. Note that the first 3 decimals coincide. The cubic root of 149523961 is about 530.7666145838.

The spelling of 149523961 in words is "one hundred forty-nine million, five hundred twenty-three thousand, nine hundred sixty-one".