1513723361 has 2 divisors, whose sum is σ = 1513723362. Its totient is φ = 1513723360.

The previous prime is 1513723349. The next prime is 1513723381. The reversal of 1513723361 is 1633273151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 849372736 + 664350625 = 29144^2 + 25775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1513723361 - 2⁶ = 1513723297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1513723381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756861680 + 756861681.

It is an arithmetic number, because the mean of its divisors is an integer number (756861681).

Almost surely, 2^1513723361 is an apocalyptic number.

It is an amenable number.

1513723361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1513723361 is an equidigital number, since it uses as much as digits as its factorization.

1513723361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 32.

The square root of 1513723361 is about 38906.5979108942. The cubic root of 1513723361 is about 1148.1946116853.

The spelling of 1513723361 in words is "one billion, five hundred thirteen million, seven hundred twenty-three thousand, three hundred sixty-one".