138462031 has 2 divisors, whose sum is σ = 138462032. Its totient is φ = 138462030.

The previous prime is 138462007. The next prime is 138462053. The reversal of 138462031 is 130264831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138462031 - 2¹¹ = 138459983 is a prime.

It is a super-2 number, since 2×138462031² = 38343468057289922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138469031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69231015 + 69231016.

It is an arithmetic number, because the mean of its divisors is an integer number (69231016).

Almost surely, 2^138462031 is an apocalyptic number.

138462031 is a deficient number, since it is larger than the sum of its proper divisors (1).

138462031 is an equidigital number, since it uses as much as digits as its factorization.

138462031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 138462031 is about 11766.9890371327. The cubic root of 138462031 is about 517.3410011975.

It can be divided in two parts, 138 and 462031, that multiplied together give a triangular number (63760278 = T₁₁₂₉₂).

The spelling of 138462031 in words is "one hundred thirty-eight million, four hundred sixty-two thousand, thirty-one".