138186451 has 12 divisors (see below), whose sum is σ = 150728368. Its totient is φ = 125938224.

The previous prime is 138186431. The next prime is 138186463. The reversal of 138186451 is 154681831.

138186451 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 138186451 - 2¹³ = 138178259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138186451.

It is not an unprimeable number, because it can be changed into a prime (138186401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88786 + ... + 90328.

Almost surely, 2^138186451 is an apocalyptic number.

138186451 is a deficient number, since it is larger than the sum of its proper divisors (12541917).

138186451 is an equidigital number, since it uses as much as digits as its factorization.

138186451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722 (or 1639 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 138186451 is about 11755.2733273200. The cubic root of 138186451 is about 516.9975531986.

The spelling of 138186451 in words is "one hundred thirty-eight million, one hundred eighty-six thousand, four hundred fifty-one".