7891990941 has 8 divisors (see below), whose sum is σ = 10532985120. Its totient is φ = 5256162032.

The previous prime is 7891990933. The next prime is 7891990949. The reversal of 7891990941 is 1490991987.

It is an interprime number because it is at equal distance from previous prime (7891990933) and next prime (7891990949).

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 7891990941 - 2³ = 7891990933 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7891990949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1287750 + ... + 1293863.

It is an arithmetic number, because the mean of its divisors is an integer number (1316623140).

Almost surely, 2^7891990941 is an apocalyptic number.

It is an amenable number.

7891990941 is a deficient number, since it is larger than the sum of its proper divisors (2640994179).

7891990941 is a wasteful number, since it uses less digits than its factorization.

7891990941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582635.

The product of its (nonzero) digits is 1469664, while the sum is 57.

The square root of 7891990941 is about 88836.8782713576. The cubic root of 7891990941 is about 1990.9584317003.

The spelling of 7891990941 in words is "seven billion, eight hundred ninety-one million, nine hundred ninety thousand, nine hundred forty-one".