137999441 has 4 divisors (see below), whose sum is σ = 138054000. Its totient is φ = 137944884.

The previous prime is 137999437. The next prime is 137999447. The reversal of 137999441 is 144999731.

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 137999441 - 2² = 137999437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137999447) 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, 23291 + ... + 28608.

It is an arithmetic number, because the mean of its divisors is an integer number (34513500).

Almost surely, 2^137999441 is an apocalyptic number.

It is an amenable number.

137999441 is a deficient number, since it is larger than the sum of its proper divisors (54559).

137999441 is an equidigital number, since it uses as much as digits as its factorization.

137999441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54558.

The product of its digits is 244944, while the sum is 47.

The square root of 137999441 is about 11747.3163318266. The cubic root of 137999441 is about 516.7642274779.

The spelling of 137999441 in words is "one hundred thirty-seven million, nine hundred ninety-nine thousand, four hundred forty-one".