149879857 has 2 divisors, whose sum is σ = 149879858. Its totient is φ = 149879856.

The previous prime is 149879843. The next prime is 149879869. The reversal of 149879857 is 758978941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136048896 + 13830961 = 11664^2 + 3719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149879857 is a prime.

It is not a weakly prime, because it can be changed into another prime (149877857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74939928 + 74939929.

It is an arithmetic number, because the mean of its divisors is an integer number (74939929).

Almost surely, 2^149879857 is an apocalyptic number.

It is an amenable number.

149879857 is a deficient number, since it is larger than the sum of its proper divisors (1).

149879857 is an equidigital number, since it uses as much as digits as its factorization.

149879857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 58.

The square root of 149879857 is about 12242.5429139538. The cubic root of 149879857 is about 531.1873900471.

The spelling of 149879857 in words is "one hundred forty-nine million, eight hundred seventy-nine thousand, eight hundred fifty-seven".