139473277 has 2 divisors, whose sum is σ = 139473278. Its totient is φ = 139473276.

The previous prime is 139473259. The next prime is 139473307. The reversal of 139473277 is 772374931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89756676 + 49716601 = 9474^2 + 7051^2 .

It is an emirp because it is prime and its reverse (772374931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139473277 - 2⁷ = 139473149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139473577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69736638 + 69736639.

It is an arithmetic number, because the mean of its divisors is an integer number (69736639).

Almost surely, 2^139473277 is an apocalyptic number.

It is an amenable number.

139473277 is a deficient number, since it is larger than the sum of its proper divisors (1).

139473277 is an equidigital number, since it uses as much as digits as its factorization.

139473277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 43.

The square root of 139473277 is about 11809.8804820371. The cubic root of 139473277 is about 518.5973998909.

The spelling of 139473277 in words is "one hundred thirty-nine million, four hundred seventy-three thousand, two hundred seventy-seven".