802991791 has 8 divisors (see below), whose sum is σ = 947308544. Its totient is φ = 666075960.

The previous prime is 802991689. The next prime is 802991807. The reversal of 802991791 is 197199208.

It is a happy number.

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 802991791 - 2¹⁹ = 802467503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802991291) 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, 1849995 + ... + 1850428.

It is an arithmetic number, because the mean of its divisors is an integer number (118413568).

Almost surely, 2^802991791 is an apocalyptic number.

802991791 is a deficient number, since it is larger than the sum of its proper divisors (144316753).

802991791 is a wasteful number, since it uses less digits than its factorization.

802991791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700461.

The product of its (nonzero) digits is 81648, while the sum is 46.

The square root of 802991791 is about 28337.1097855798. The cubic root of 802991791 is about 929.4735491178.

The spelling of 802991791 in words is "eight hundred two million, nine hundred ninety-one thousand, seven hundred ninety-one".