139475723 has 2 divisors, whose sum is σ = 139475724. Its totient is φ = 139475722.

The previous prime is 139475719. The next prime is 139475729. The reversal of 139475723 is 327574931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139475723 - 2² = 139475719 is a prime.

It is not a weakly prime, because it can be changed into another prime (139475729) 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, 69737861 + 69737862.

It is an arithmetic number, because the mean of its divisors is an integer number (69737862).

Almost surely, 2^139475723 is an apocalyptic number.

139475723 is a deficient number, since it is larger than the sum of its proper divisors (1).

139475723 is an equidigital number, since it uses as much as digits as its factorization.

139475723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 41.

The square root of 139475723 is about 11809.9840389393. The cubic root of 139475723 is about 518.6004314915.

The spelling of 139475723 in words is "one hundred thirty-nine million, four hundred seventy-five thousand, seven hundred twenty-three".