1361683801 has 3 divisors (see below), whose sum is σ = 1361720703. Its totient is φ = 1361646900.

The previous prime is 1361683753. The next prime is 1361683847. The reversal of 1361683801 is 1083861631.

The square root of 1361683801 is 36901.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 26512201 + 1335171600 = 5149^2 + 36540^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1361683801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361683601) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 18451 + ... + 55351.

It is an arithmetic number, because the mean of its divisors is an integer number (453906901).

Almost surely, 2^1361683801 is an apocalyptic number.

1361683801 is the 36901-st square number.

1361683801 is the 18451-st centered octagonal number.

It is an amenable number.

1361683801 is a deficient number, since it is larger than the sum of its proper divisors (36902).

1361683801 is an frugal number, since it uses more digits than its factorization.

1361683801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73802 (or 36901 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The cubic root of 1361683801 is about 1108.3887020988.

Multiplying 1361683801 by its product of nonzero digits (20736), we get a square (28235875297536 = 5313744²).

The spelling of 1361683801 in words is "one billion, three hundred sixty-one million, six hundred eighty-three thousand, eight hundred one".