137799393 has 4 divisors (see below), whose sum is σ = 183732528. Its totient is φ = 91866260.

The previous prime is 137799379. The next prime is 137799469. The reversal of 137799393 is 393997731.

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, and also an emirpimes, since its reverse is a distinct semiprime: 393997731 = 3 ⋅131332577.

It is a cyclic number.

It is not a de Polignac number, because 137799393 - 2⁴ = 137799377 is a prime.

It is a super-2 number, since 2×137799393² = 37977345422336898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (137799313) by changing a digit.

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, 22966563 + ... + 22966568.

It is an arithmetic number, because the mean of its divisors is an integer number (45933132).

Almost surely, 2^137799393 is an apocalyptic number.

It is an amenable number.

137799393 is a deficient number, since it is larger than the sum of its proper divisors (45933135).

137799393 is an equidigital number, since it uses as much as digits as its factorization.

137799393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45933134.

The product of its digits is 964467, while the sum is 51.

The square root of 137799393 is about 11738.7986182573. The cubic root of 137799393 is about 516.5144012401.

The spelling of 137799393 in words is "one hundred thirty-seven million, seven hundred ninety-nine thousand, three hundred ninety-three".