139623277 has 2 divisors, whose sum is σ = 139623278. Its totient is φ = 139623276.

The previous prime is 139623259. The next prime is 139623299. The reversal of 139623277 is 772326931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134119561 + 5503716 = 11581^2 + 2346^2 .

It is a cyclic number.

It is not a de Polignac number, because 139623277 - 2¹⁹ = 139098989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139627277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69811638 + 69811639.

It is an arithmetic number, because the mean of its divisors is an integer number (69811639).

Almost surely, 2^139623277 is an apocalyptic number.

It is an amenable number.

139623277 is a deficient number, since it is larger than the sum of its proper divisors (1).

139623277 is an equidigital number, since it uses as much as digits as its factorization.

139623277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 40.

The square root of 139623277 is about 11816.2293901227. The cubic root of 139623277 is about 518.7832461007.

The spelling of 139623277 in words is "one hundred thirty-nine million, six hundred twenty-three thousand, two hundred seventy-seven".