149731157 has 4 divisors (see below), whose sum is σ = 150116460. Its totient is φ = 149345856.

The previous prime is 149731133. The next prime is 149731207. The reversal of 149731157 is 751137941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56685841 + 93045316 = 7529^2 + 9646^2 .

It is a cyclic number.

It is not a de Polignac number, because 149731157 - 2⁶ = 149731093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149731157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149734157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192068 + ... + 192845.

It is an arithmetic number, because the mean of its divisors is an integer number (37529115).

Almost surely, 2^149731157 is an apocalyptic number.

It is an amenable number.

149731157 is a deficient number, since it is larger than the sum of its proper divisors (385303).

149731157 is an equidigital number, since it uses as much as digits as its factorization.

149731157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385302.

The product of its digits is 26460, while the sum is 38.

The square root of 149731157 is about 12236.4683221917. The cubic root of 149731157 is about 531.0116632954.

The spelling of 149731157 in words is "one hundred forty-nine million, seven hundred thirty-one thousand, one hundred fifty-seven".