149919157 has 2 divisors, whose sum is σ = 149919158. Its totient is φ = 149919156.

The previous prime is 149919071. The next prime is 149919163. The reversal of 149919157 is 751919941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83887281 + 66031876 = 9159^2 + 8126^2 .

It is an emirp because it is prime and its reverse (751919941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149919157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149919257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74959578 + 74959579.

It is an arithmetic number, because the mean of its divisors is an integer number (74959579).

Almost surely, 2^149919157 is an apocalyptic number.

It is an amenable number.

149919157 is a deficient number, since it is larger than the sum of its proper divisors (1).

149919157 is an equidigital number, since it uses as much as digits as its factorization.

149919157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102060, while the sum is 46.

The square root of 149919157 is about 12244.1478674508. The cubic root of 149919157 is about 531.2338135414.

The spelling of 149919157 in words is "one hundred forty-nine million, nine hundred nineteen thousand, one hundred fifty-seven".