1316762621 has 2 divisors, whose sum is σ = 1316762622. Its totient is φ = 1316762620.

The previous prime is 1316762569. The next prime is 1316762717. The reversal of 1316762621 is 1262676131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011876100 + 304886521 = 31810^2 + 17461^2 .

It is a cyclic number.

It is not a de Polignac number, because 1316762621 - 2¹⁰ = 1316761597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1316662621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658381310 + 658381311.

It is an arithmetic number, because the mean of its divisors is an integer number (658381311).

Almost surely, 2^1316762621 is an apocalyptic number.

It is an amenable number.

1316762621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316762621 is an equidigital number, since it uses as much as digits as its factorization.

1316762621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 1316762621 is about 36287.2239362561. The cubic root of 1316762621 is about 1096.0637885889.

The spelling of 1316762621 in words is "one billion, three hundred sixteen million, seven hundred sixty-two thousand, six hundred twenty-one".