139797547 has 2 divisors, whose sum is σ = 139797548. Its totient is φ = 139797546.

The previous prime is 139797527. The next prime is 139797557. The reversal of 139797547 is 745797931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139797547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139797494 and 139797503.

It is not a weakly prime, because it can be changed into another prime (139797527) 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 as a sum of consecutive naturals, namely, 69898773 + 69898774.

It is an arithmetic number, because the mean of its divisors is an integer number (69898774).

Almost surely, 2^139797547 is an apocalyptic number.

139797547 is a deficient number, since it is larger than the sum of its proper divisors (1).

139797547 is an equidigital number, since it uses as much as digits as its factorization.

139797547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1666980, while the sum is 52.

The square root of 139797547 is about 11823.6012703406. The cubic root of 139797547 is about 518.9989951508.

The spelling of 139797547 in words is "one hundred thirty-nine million, seven hundred ninety-seven thousand, five hundred forty-seven".