8354991 has 4 divisors (see below), whose sum is σ = 11139992. Its totient is φ = 5569992.

The previous prime is 8354989. The next prime is 8354993. The reversal of 8354991 is 1994538.

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

It is an interprime number because it is at equal distance from previous prime (8354989) and next prime (8354993).

It is not a de Polignac number, because 8354991 - 2¹ = 8354989 is a prime.

It is a super-2 number, since 2×8354991² = 139611749220162, which contains 22 as substring.

It is the 2891-st Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8354993) by changing a digit.

It is a nontrivial repunit in base 2890.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1392496 + ... + 1392501.

It is an arithmetic number, because the mean of its divisors is an integer number (2784998).

Almost surely, 2^8354991 is an apocalyptic number.

8354991 is a deficient number, since it is larger than the sum of its proper divisors (2785001).

8354991 is a wasteful number, since it uses less digits than its factorization.

8354991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785000.

The product of its digits is 38880, while the sum is 39.

The square root of 8354991 is about 2890.5001297353. The cubic root of 8354991 is about 202.9155496558.

The spelling of 8354991 in words is "eight million, three hundred fifty-four thousand, nine hundred ninety-one".