137709398 has 4 divisors (see below), whose sum is σ = 206564100. Its totient is φ = 68854698.

The previous prime is 137709373. The next prime is 137709419. The reversal of 137709398 is 893907731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 893907731 = 2543 ⋅351517.

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 as a sum of consecutive naturals, namely, 34427348 + ... + 34427351.

It is an arithmetic number, because the mean of its divisors is an integer number (51641025).

Almost surely, 2^137709398 is an apocalyptic number.

137709398 is a deficient number, since it is larger than the sum of its proper divisors (68854702).

137709398 is an equidigital number, since it uses as much as digits as its factorization.

137709398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68854701.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 137709398 is about 11734.9647634750. The cubic root of 137709398 is about 516.4019337961.

The spelling of 137709398 in words is "one hundred thirty-seven million, seven hundred nine thousand, three hundred ninety-eight".