149641577 has 2 divisors, whose sum is σ = 149641578. Its totient is φ = 149641576.

The previous prime is 149641573. The next prime is 149641603. The reversal of 149641577 is 775146941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146627881 + 3013696 = 12109^2 + 1736^2 .

It is an emirp because it is prime and its reverse (775146941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149641577 - 2² = 149641573 is a prime.

It is not a weakly prime, because it can be changed into another prime (149641573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74820788 + 74820789.

It is an arithmetic number, because the mean of its divisors is an integer number (74820789).

Almost surely, 2^149641577 is an apocalyptic number.

It is an amenable number.

149641577 is a deficient number, since it is larger than the sum of its proper divisors (1).

149641577 is an equidigital number, since it uses as much as digits as its factorization.

149641577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 149641577 is about 12232.8074046803. The cubic root of 149641577 is about 530.9057456514.

The spelling of 149641577 in words is "one hundred forty-nine million, six hundred forty-one thousand, five hundred seventy-seven".