149424857 has 2 divisors, whose sum is σ = 149424858. Its totient is φ = 149424856.

The previous prime is 149424853. The next prime is 149424887. The reversal of 149424857 is 758424941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91604041 + 57820816 = 9571^2 + 7604^2 .

It is a cyclic number.

It is not a de Polignac number, because 149424857 - 2² = 149424853 is a prime.

It is not a weakly prime, because it can be changed into another prime (149424851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74712428 + 74712429.

It is an arithmetic number, because the mean of its divisors is an integer number (74712429).

Almost surely, 2^149424857 is an apocalyptic number.

It is an amenable number.

149424857 is a deficient number, since it is larger than the sum of its proper divisors (1).

149424857 is an equidigital number, since it uses as much as digits as its factorization.

149424857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 44.

The square root of 149424857 is about 12223.9460486375. The cubic root of 149424857 is about 530.6493251991.

The spelling of 149424857 in words is "one hundred forty-nine million, four hundred twenty-four thousand, eight hundred fifty-seven".