3516991 has 4 divisors (see below), whose sum is σ = 3526000. Its totient is φ = 3507984.

The previous prime is 3516973. The next prime is 3517009. The reversal of 3516991 is 1996153.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1996153 = 149 ⋅13397.

It is an interprime number because it is at equal distance from previous prime (3516973) and next prime (3517009).

It is a cyclic number.

It is not a de Polignac number, because 3516991 - 2²¹ = 1419839 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 (3516971) 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, 3891 + ... + 4708.

It is an arithmetic number, because the mean of its divisors is an integer number (881500).

Almost surely, 2^3516991 is an apocalyptic number.

3516991 is a deficient number, since it is larger than the sum of its proper divisors (9009).

3516991 is an equidigital number, since it uses as much as digits as its factorization.

3516991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9008.

The product of its digits is 7290, while the sum is 34.

The square root of 3516991 is about 1875.3642312895. The cubic root of 3516991 is about 152.0747410587.

The spelling of 3516991 in words is "three million, five hundred sixteen thousand, nine hundred ninety-one".