139777783 has 2 divisors, whose sum is σ = 139777784. Its totient is φ = 139777782.

The previous prime is 139777777. The next prime is 139777787. The reversal of 139777783 is 387777931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139777783 - 2⁵ = 139777751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139777783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139777787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69888891 + 69888892.

It is an arithmetic number, because the mean of its divisors is an integer number (69888892).

Almost surely, 2^139777783 is an apocalyptic number.

139777783 is a deficient number, since it is larger than the sum of its proper divisors (1).

139777783 is an equidigital number, since it uses as much as digits as its factorization.

139777783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555848, while the sum is 52.

The square root of 139777783 is about 11822.7654548333. The cubic root of 139777783 is about 518.9745360197.

The spelling of 139777783 in words is "one hundred thirty-nine million, seven hundred seventy-seven thousand, seven hundred eighty-three".