149220157 has 2 divisors, whose sum is σ = 149220158. Its totient is φ = 149220156.

The previous prime is 149220133. The next prime is 149220161. The reversal of 149220157 is 751022941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110544196 + 38675961 = 10514^2 + 6219^2 .

It is an emirp because it is prime and its reverse (751022941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149220157 - 2¹¹ = 149218109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149220187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74610078 + 74610079.

It is an arithmetic number, because the mean of its divisors is an integer number (74610079).

Almost surely, 2^149220157 is an apocalyptic number.

It is an amenable number.

149220157 is a deficient number, since it is larger than the sum of its proper divisors (1).

149220157 is an equidigital number, since it uses as much as digits as its factorization.

149220157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 149220157 is about 12215.5702691278. The cubic root of 149220157 is about 530.4068988746.

The spelling of 149220157 in words is "one hundred forty-nine million, two hundred twenty thousand, one hundred fifty-seven".