149642287 has 2 divisors, whose sum is σ = 149642288. Its totient is φ = 149642286.

The previous prime is 149642263. The next prime is 149642303. The reversal of 149642287 is 782246941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149642287 - 2⁷ = 149642159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149642237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74821143 + 74821144.

It is an arithmetic number, because the mean of its divisors is an integer number (74821144).

Almost surely, 2^149642287 is an apocalyptic number.

149642287 is a deficient number, since it is larger than the sum of its proper divisors (1).

149642287 is an equidigital number, since it uses as much as digits as its factorization.

149642287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The square root of 149642287 is about 12232.8364249670. The cubic root of 149642287 is about 530.9065853077.

The spelling of 149642287 in words is "one hundred forty-nine million, six hundred forty-two thousand, two hundred eighty-seven".