138610774 has 4 divisors (see below), whose sum is σ = 207916164. Its totient is φ = 69305386.

The previous prime is 138610763. The next prime is 138610777. The reversal of 138610774 is 477016831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138610777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34652692 + ... + 34652695.

It is an arithmetic number, because the mean of its divisors is an integer number (51979041).

Almost surely, 2^138610774 is an apocalyptic number.

138610774 is a deficient number, since it is larger than the sum of its proper divisors (69305390).

138610774 is an equidigital number, since it uses as much as digits as its factorization.

138610774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69305389.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 138610774 is about 11773.3076915538. The cubic root of 138610774 is about 517.5261862950.

The spelling of 138610774 in words is "one hundred thirty-eight million, six hundred ten thousand, seven hundred seventy-four".