139297783 has 2 divisors, whose sum is σ = 139297784. Its totient is φ = 139297782.

The previous prime is 139297771. The next prime is 139297793. The reversal of 139297783 is 387792931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139297783 - 2⁵ = 139297751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139297703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69648891 + 69648892.

It is an arithmetic number, because the mean of its divisors is an integer number (69648892).

Almost surely, 2^139297783 is an apocalyptic number.

139297783 is a deficient number, since it is larger than the sum of its proper divisors (1).

139297783 is an equidigital number, since it uses as much as digits as its factorization.

139297783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 49.

The square root of 139297783 is about 11802.4481782383. The cubic root of 139297783 is about 518.3797980378.

It can be divided in two parts, 13929 and 7783, that added together give a palindrome (21712).

The spelling of 139297783 in words is "one hundred thirty-nine million, two hundred ninety-seven thousand, seven hundred eighty-three".