138037031 has 4 divisors (see below), whose sum is σ = 150585864. Its totient is φ = 125488200.

The previous prime is 138037021. The next prime is 138037057. The reversal of 138037031 is 130730831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138037031 - 2⁶ = 138036967 is a prime.

It is a super-2 number, since 2×138037031² = 38108443854589922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138037001) 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, 6274400 + ... + 6274421.

It is an arithmetic number, because the mean of its divisors is an integer number (37646466).

Almost surely, 2^138037031 is an apocalyptic number.

138037031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138037031 is a deficient number, since it is larger than the sum of its proper divisors (12548833).

138037031 is a wasteful number, since it uses less digits than its factorization.

138037031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12548832.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 138037031 is about 11748.9161627786. The cubic root of 138037031 is about 516.8111441023.

Adding to 138037031 its reverse (130730831), we get a palindrome (268767862).

The spelling of 138037031 in words is "one hundred thirty-eight million, thirty-seven thousand, thirty-one".