1319642801 has 2 divisors, whose sum is σ = 1319642802. Its totient is φ = 1319642800.

The previous prime is 1319642771. The next prime is 1319642809. The reversal of 1319642801 is 1082469131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1092236401 + 227406400 = 33049^2 + 15080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1319642801 is a prime.

It is a super-2 number, since 2×1319642801² = 3482914244462251202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1319642809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659821400 + 659821401.

It is an arithmetic number, because the mean of its divisors is an integer number (659821401).

Almost surely, 2^1319642801 is an apocalyptic number.

It is an amenable number.

1319642801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319642801 is an equidigital number, since it uses as much as digits as its factorization.

1319642801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1319642801 is about 36326.8881271160. Note that the first 3 decimals coincide. The cubic root of 1319642801 is about 1096.8623537106.

The spelling of 1319642801 in words is "one billion, three hundred nineteen million, six hundred forty-two thousand, eight hundred one".