149857867 has 2 divisors, whose sum is σ = 149857868. Its totient is φ = 149857866.

The previous prime is 149857853. The next prime is 149857891. The reversal of 149857867 is 768758941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149857867 - 2⁷ = 149857739 is a prime.

It is not a weakly prime, because it can be changed into another prime (149867867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74928933 + 74928934.

It is an arithmetic number, because the mean of its divisors is an integer number (74928934).

Almost surely, 2^149857867 is an apocalyptic number.

149857867 is a deficient number, since it is larger than the sum of its proper divisors (1).

149857867 is an equidigital number, since it uses as much as digits as its factorization.

149857867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 55.

The square root of 149857867 is about 12241.6447832797. The cubic root of 149857867 is about 531.1614106120.

The spelling of 149857867 in words is "one hundred forty-nine million, eight hundred fifty-seven thousand, eight hundred sixty-seven".