1361201791 has 4 divisors (see below), whose sum is σ = 1361560752. Its totient is φ = 1360842832.

The previous prime is 1361201783. The next prime is 1361201813. The reversal of 1361201791 is 1971021631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1361201791 - 2³ = 1361201783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361207791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173731 + ... + 181396.

It is an arithmetic number, because the mean of its divisors is an integer number (340390188).

Almost surely, 2^1361201791 is an apocalyptic number.

1361201791 is a deficient number, since it is larger than the sum of its proper divisors (358961).

1361201791 is an equidigital number, since it uses as much as digits as its factorization.

1361201791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358960.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 1361201791 is about 36894.4682981067. The cubic root of 1361201791 is about 1108.2579038697.

The spelling of 1361201791 in words is "one billion, three hundred sixty-one million, two hundred one thousand, seven hundred ninety-one".