138783854 has 12 divisors (see below), whose sum is σ = 228821712. Its totient is φ = 63083460.

The previous prime is 138783851. The next prime is 138783857. The reversal of 138783854 is 458387831.

138783854 = 3547² + 3548² + ... + 3557².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (138783851) and next prime (138783857).

It is a junction number, because it is equal to n+sod(n) for n = 138783799 and 138783808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138783851) 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 5 ways as a sum of consecutive naturals, for example, 286502 + ... + 286985.

It is an arithmetic number, because the mean of its divisors is an integer number (19068476).

Almost surely, 2^138783854 is an apocalyptic number.

138783854 is a deficient number, since it is larger than the sum of its proper divisors (90037858).

138783854 is a wasteful number, since it uses less digits than its factorization.

138783854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573511 (or 573500 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 138783854 is about 11780.6559240137. The cubic root of 138783854 is about 517.7415042746.

The spelling of 138783854 in words is "one hundred thirty-eight million, seven hundred eighty-three thousand, eight hundred fifty-four".