1392977 has 2 divisors, whose sum is σ = 1392978. Its totient is φ = 1392976.

The previous prime is 1392959. The next prime is 1392983. The reversal of 1392977 is 7792931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1274641 + 118336 = 1129^2 + 344^2 .

It is an emirp because it is prime and its reverse (7792931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1392977 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1392977.

It is not a weakly prime, because it can be changed into another prime (1392277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696488 + 696489.

It is an arithmetic number, because the mean of its divisors is an integer number (696489).

2^1392977 is an apocalyptic number.

It is an amenable number.

1392977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392977 is an equidigital number, since it uses as much as digits as its factorization.

1392977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 38.

The square root of 1392977 is about 1180.2444662018. The cubic root of 1392977 is about 111.6815197688.

The spelling of 1392977 in words is "one million, three hundred ninety-two thousand, nine hundred seventy-seven".