7040991 has 4 divisors (see below), whose sum is σ = 9387992. Its totient is φ = 4693992.

The previous prime is 7040987. The next prime is 7040993. The reversal of 7040991 is 1990407.

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

It is not a de Polignac number, because 7040991 - 2² = 7040987 is a prime.

It is a D-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 (7040993) 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, 1173496 + ... + 1173501.

It is an arithmetic number, because the mean of its divisors is an integer number (2346998).

Almost surely, 2^7040991 is an apocalyptic number.

7040991 is a deficient number, since it is larger than the sum of its proper divisors (2347001).

7040991 is a wasteful number, since it uses less digits than its factorization.

7040991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347000.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 7040991 is about 2653.4865743018. The cubic root of 7040991 is about 191.6657868475.

It can be divided in two parts, 70409 and 91, that added together give a triangular number (70500 = T₃₇₅).

The spelling of 7040991 in words is "seven million, forty thousand, nine hundred ninety-one".