137220389 has 4 divisors (see below), whose sum is σ = 137390400. Its totient is φ = 137050380.

The previous prime is 137220329. The next prime is 137220403. The reversal of 137220389 is 983022731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137220389 - 2⁸ = 137220133 is a prime.

It is a super-2 number, since 2×137220389² = 37658870314622642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137220329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83789 + ... + 85410.

It is an arithmetic number, because the mean of its divisors is an integer number (34347600).

Almost surely, 2^137220389 is an apocalyptic number.

It is an amenable number.

137220389 is a deficient number, since it is larger than the sum of its proper divisors (170011).

137220389 is an equidigital number, since it uses as much as digits as its factorization.

137220389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170010.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 137220389 is about 11714.1106790059. The cubic root of 137220389 is about 515.7899574279.

The spelling of 137220389 in words is "one hundred thirty-seven million, two hundred twenty thousand, three hundred eighty-nine".