137823969 has 4 divisors (see below), whose sum is σ = 183765296. Its totient is φ = 91882644.

The previous prime is 137823943. The next prime is 137823971. The reversal of 137823969 is 969328731.

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 not a de Polignac number, because 137823969 - 2⁸ = 137823713 is a prime.

It is a super-2 number, since 2×137823969² = 37990892861825922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137823269) 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, 22970659 + ... + 22970664.

It is an arithmetic number, because the mean of its divisors is an integer number (45941324).

Almost surely, 2^137823969 is an apocalyptic number.

It is an amenable number.

137823969 is a deficient number, since it is larger than the sum of its proper divisors (45941327).

137823969 is an equidigital number, since it uses as much as digits as its factorization.

137823969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45941326.

The product of its digits is 489888, while the sum is 48.

The square root of 137823969 is about 11739.8453567328. The cubic root of 137823969 is about 516.5451055441.

The spelling of 137823969 in words is "one hundred thirty-seven million, eight hundred twenty-three thousand, nine hundred sixty-nine".