1461990791 has 8 divisors (see below), whose sum is σ = 1526183424. Its totient is φ = 1397850520.

The previous prime is 1461990787. The next prime is 1461990799. The reversal of 1461990791 is 1970991641.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1461990791 - 2² = 1461990787 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 (1461990799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50630 + ... + 74076.

It is an arithmetic number, because the mean of its divisors is an integer number (190772928).

Almost surely, 2^1461990791 is an apocalyptic number.

1461990791 is a deficient number, since it is larger than the sum of its proper divisors (64192633).

1461990791 is a wasteful number, since it uses less digits than its factorization.

1461990791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26181.

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 1461990791 is about 38235.9881656013. The cubic root of 1461990791 is about 1134.9625870827.

The spelling of 1461990791 in words is "one billion, four hundred sixty-one million, nine hundred ninety thousand, seven hundred ninety-one".