137405287 has 2 divisors, whose sum is σ = 137405288. Its totient is φ = 137405286.

The previous prime is 137405249. The next prime is 137405293. The reversal of 137405287 is 782504731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137405287 - 2¹¹ = 137403239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137405987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68702643 + 68702644.

It is an arithmetic number, because the mean of its divisors is an integer number (68702644).

Almost surely, 2^137405287 is an apocalyptic number.

137405287 is a deficient number, since it is larger than the sum of its proper divisors (1).

137405287 is an equidigital number, since it uses as much as digits as its factorization.

137405287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 137405287 is about 11722.0001279645. Note that the first 3 decimals coincide. The cubic root of 137405287 is about 516.0215209961.

The spelling of 137405287 in words is "one hundred thirty-seven million, four hundred five thousand, two hundred eighty-seven".