137990 has 8 divisors (see below), whose sum is σ = 248400. Its totient is φ = 55192.

The previous prime is 137983. The next prime is 137993. The reversal of 137990 is 99731.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6890 + ... + 6909.

It is an arithmetic number, because the mean of its divisors is an integer number (31050).

2¹³⁷⁹⁹⁰ is an apocalyptic number.

137990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

137990 is a deficient number, since it is larger than the sum of its proper divisors (110410).

137990 is a wasteful number, since it uses less digits than its factorization.

137990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13806.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 137990 is about 371.4700526287. The cubic root of 137990 is about 51.6752442690.

The spelling of 137990 in words is "one hundred thirty-seven thousand, nine hundred ninety".