139774783 has 2 divisors, whose sum is σ = 139774784. Its totient is φ = 139774782.

The previous prime is 139774763. The next prime is 139774787. The reversal of 139774783 is 387477931.

It is a strong prime.

It is an emirp because it is prime and its reverse (387477931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139774783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139774787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69887391 + 69887392.

It is an arithmetic number, because the mean of its divisors is an integer number (69887392).

Almost surely, 2^139774783 is an apocalyptic number.

139774783 is a deficient number, since it is larger than the sum of its proper divisors (1).

139774783 is an equidigital number, since it uses as much as digits as its factorization.

139774783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 49.

The square root of 139774783 is about 11822.6385802832. The cubic root of 139774783 is about 518.9708231389.

The spelling of 139774783 in words is "one hundred thirty-nine million, seven hundred seventy-four thousand, seven hundred eighty-three".