1363771979 has 2 divisors, whose sum is σ = 1363771980. Its totient is φ = 1363771978.

The previous prime is 1363771973. The next prime is 1363772017. The reversal of 1363771979 is 9791773631.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1363771979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1363771979.

It is not a weakly prime, because it can be changed into another prime (1363771973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 681885989 + 681885990.

It is an arithmetic number, because the mean of its divisors is an integer number (681885990).

Almost surely, 2^1363771979 is an apocalyptic number.

1363771979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1363771979 is an equidigital number, since it uses as much as digits as its factorization.

1363771979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1500282, while the sum is 53.

The square root of 1363771979 is about 36929.2834888520. The cubic root of 1363771979 is about 1108.9549938195.

The spelling of 1363771979 in words is "one billion, three hundred sixty-three million, seven hundred seventy-one thousand, nine hundred seventy-nine".