137811999 has 16 divisors (see below), whose sum is σ = 199336032. Its totient is φ = 84185088.

The previous prime is 137811991. The next prime is 137812027. The reversal of 137811999 is 999118731.

It is a happy number.

137811999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 137811999 - 2³ = 137811991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137811991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7554 + ... + 18239.

It is an arithmetic number, because the mean of its divisors is an integer number (12458502).

Almost surely, 2^137811999 is an apocalyptic number.

137811999 is a deficient number, since it is larger than the sum of its proper divisors (61524033).

137811999 is a wasteful number, since it uses less digits than its factorization.

137811999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25946.

The product of its digits is 122472, while the sum is 48.

The square root of 137811999 is about 11739.3355433772. The cubic root of 137811999 is about 516.5301511450.

The spelling of 137811999 in words is "one hundred thirty-seven million, eight hundred eleven thousand, nine hundred ninety-nine".