137494287 has 16 divisors (see below), whose sum is σ = 232794880. Its totient is φ = 78568056.

The previous prime is 137494277. The next prime is 137494303. The reversal of 137494287 is 782494731.

137494287 is a `hidden beast` number, since 137 + 494 + 28 + 7 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-137494287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137494237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 363553 + ... + 363930.

It is an arithmetic number, because the mean of its divisors is an integer number (14549680).

Almost surely, 2^137494287 is an apocalyptic number.

137494287 is a deficient number, since it is larger than the sum of its proper divisors (95300593).

137494287 is an equidigital number, since it uses as much as digits as its factorization.

137494287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727499 (or 727493 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 137494287 is about 11725.7957938896. The cubic root of 137494287 is about 516.1329092458.

The spelling of 137494287 in words is "one hundred thirty-seven million, four hundred ninety-four thousand, two hundred eighty-seven".