1321422877 has 2 divisors, whose sum is σ = 1321422878. Its totient is φ = 1321422876.

The previous prime is 1321422857. The next prime is 1321422889. The reversal of 1321422877 is 7782241231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 947039076 + 374383801 = 30774^2 + 19349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321422877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321422827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660711438 + 660711439.

It is an arithmetic number, because the mean of its divisors is an integer number (660711439).

Almost surely, 2^1321422877 is an apocalyptic number.

It is an amenable number.

1321422877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321422877 is an equidigital number, since it uses as much as digits as its factorization.

1321422877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 37.

The square root of 1321422877 is about 36351.3806752921. The cubic root of 1321422877 is about 1097.3553207200.

The spelling of 1321422877 in words is "one billion, three hundred twenty-one million, four hundred twenty-two thousand, eight hundred seventy-seven".