149230691 has 2 divisors, whose sum is σ = 149230692. Its totient is φ = 149230690.

The previous prime is 149230673. The next prime is 149230729. The reversal of 149230691 is 196032941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149230691 - 2²⁶ = 82121827 is a prime.

It is not a weakly prime, because it can be changed into another prime (149230651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74615345 + 74615346.

It is an arithmetic number, because the mean of its divisors is an integer number (74615346).

Almost surely, 2^149230691 is an apocalyptic number.

149230691 is a deficient number, since it is larger than the sum of its proper divisors (1).

149230691 is an equidigital number, since it uses as much as digits as its factorization.

149230691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 149230691 is about 12216.0014325474. The cubic root of 149230691 is about 530.4193797058.

Subtracting from 149230691 its sum of digits (35), we obtain a square (149230656 = 12216²).

The spelling of 149230691 in words is "one hundred forty-nine million, two hundred thirty thousand, six hundred ninety-one".