137663775 has 18 divisors (see below), whose sum is σ = 246571520. Its totient is φ = 73420560.

The previous prime is 137663767. The next prime is 137663803. The reversal of 137663775 is 577366731.

It is a happy number.

137663775 is a `hidden beast` number, since 1 + 3 + 7 + 6 + 637 + 7 + 5 = 666.

It is not a de Polignac number, because 137663775 - 2³ = 137663767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 137663775.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 305695 + ... + 306144.

Almost surely, 2^137663775 is an apocalyptic number.

137663775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

137663775 is a deficient number, since it is larger than the sum of its proper divisors (108907745).

137663775 is a wasteful number, since it uses less digits than its factorization.

137663775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611855 (or 611847 counting only the distinct ones).

The product of its digits is 555660, while the sum is 45.

The square root of 137663775 is about 11733.0207107974. The cubic root of 137663775 is about 516.3448996648.

The spelling of 137663775 in words is "one hundred thirty-seven million, six hundred sixty-three thousand, seven hundred seventy-five".