138700451 has 4 divisors (see below), whose sum is σ = 139152552. Its totient is φ = 138248352.

The previous prime is 138700439. The next prime is 138700453. The reversal of 138700451 is 154007831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154007831 = 6011 ⋅25621.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138700451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138700453) 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 in 3 ways as a sum of consecutive naturals, for example, 225590 + ... + 226203.

It is an arithmetic number, because the mean of its divisors is an integer number (34788138).

Almost surely, 2^138700451 is an apocalyptic number.

138700451 is a deficient number, since it is larger than the sum of its proper divisors (452101).

138700451 is an equidigital number, since it uses as much as digits as its factorization.

138700451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452100.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 138700451 is about 11777.1155636684. The cubic root of 138700451 is about 517.6377701914.

The spelling of 138700451 in words is "one hundred thirty-eight million, seven hundred thousand, four hundred fifty-one".