451686139 has 2 divisors, whose sum is σ = 451686140. Its totient is φ = 451686138.

The previous prime is 451686127. The next prime is 451686161. The reversal of 451686139 is 931686154.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-451686139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 451686095 and 451686104.

It is not a weakly prime, because it can be changed into another prime (451687139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225843069 + 225843070.

It is an arithmetic number, because the mean of its divisors is an integer number (225843070).

Almost surely, 2^451686139 is an apocalyptic number.

451686139 is a deficient number, since it is larger than the sum of its proper divisors (1).

451686139 is an equidigital number, since it uses as much as digits as its factorization.

451686139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 451686139 is about 21252.9089538350. The cubic root of 451686139 is about 767.2653536850.

The spelling of 451686139 in words is "four hundred fifty-one million, six hundred eighty-six thousand, one hundred thirty-nine".