137121398 has 8 divisors (see below), whose sum is σ = 205891392. Its totient is φ = 68490936.

The previous prime is 137121379. The next prime is 137121403. The reversal of 137121398 is 893121731.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 32390 + ... + 36377.

It is an arithmetic number, because the mean of its divisors is an integer number (25736424).

Almost surely, 2^137121398 is an apocalyptic number.

137121398 is a deficient number, since it is larger than the sum of its proper divisors (68769994).

137121398 is an equidigital number, since it uses as much as digits as its factorization.

137121398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69766.

The product of its digits is 9072, while the sum is 35.

The square root of 137121398 is about 11709.8846279543. The cubic root of 137121398 is about 515.6658970341.

The spelling of 137121398 in words is "one hundred thirty-seven million, one hundred twenty-one thousand, three hundred ninety-eight".