139499527 has 2 divisors, whose sum is σ = 139499528. Its totient is φ = 139499526.

The previous prime is 139499513. The next prime is 139499537. The reversal of 139499527 is 725994931.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139499527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139499537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69749763 + 69749764.

It is an arithmetic number, because the mean of its divisors is an integer number (69749764).

Almost surely, 2^139499527 is an apocalyptic number.

139499527 is a deficient number, since it is larger than the sum of its proper divisors (1).

139499527 is an equidigital number, since it uses as much as digits as its factorization.

139499527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 49.

The square root of 139499527 is about 11810.9917873141. The cubic root of 139499527 is about 518.6299325932.

The spelling of 139499527 in words is "one hundred thirty-nine million, four hundred ninety-nine thousand, five hundred twenty-seven".