1396654817 has 2 divisors, whose sum is σ = 1396654818. Its totient is φ = 1396654816.

The previous prime is 1396654813. The next prime is 1396654837. The reversal of 1396654817 is 7184566931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1327582096 + 69072721 = 36436^2 + 8311^2 .

It is a cyclic number.

It is not a de Polignac number, because 1396654817 - 2² = 1396654813 is a prime.

It is not a weakly prime, because it can be changed into another prime (1396654813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698327408 + 698327409.

It is an arithmetic number, because the mean of its divisors is an integer number (698327409).

Almost surely, 2^1396654817 is an apocalyptic number.

It is an amenable number.

1396654817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396654817 is an equidigital number, since it uses as much as digits as its factorization.

1396654817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The square root of 1396654817 is about 37371.8452447829. The cubic root of 1396654817 is about 1117.7972268986.

The spelling of 1396654817 in words is "one billion, three hundred ninety-six million, six hundred fifty-four thousand, eight hundred seventeen".