137996817 has 8 divisors (see below), whose sum is σ = 210280896. Its totient is φ = 78855312.

The previous prime is 137996809. The next prime is 137996839. The reversal of 137996817 is 718699731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137996817 - 2³ = 137996809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137996817.

It is not an unprimeable number, because it can be changed into a prime (137996897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3285618 + ... + 3285659.

It is an arithmetic number, because the mean of its divisors is an integer number (26285112).

Almost surely, 2^137996817 is an apocalyptic number.

It is an amenable number.

137996817 is a deficient number, since it is larger than the sum of its proper divisors (72284079).

137996817 is an equidigital number, since it uses as much as digits as its factorization.

137996817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6571287.

The product of its digits is 571536, while the sum is 51.

The square root of 137996817 is about 11747.2046462126. The cubic root of 137996817 is about 516.7609521074.

The spelling of 137996817 in words is "one hundred thirty-seven million, nine hundred ninety-six thousand, eight hundred seventeen".