7150991 has 4 divisors (see below), whose sum is σ = 7166400. Its totient is φ = 7135584.

The previous prime is 7150967. The next prime is 7151009. The reversal of 7150991 is 1990517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1990517 = 587 ⋅3391.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7150991 is a prime.

It is a super-2 number, since 2×7150991² = 102273344564162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7150961) 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, 6986 + ... + 7943.

It is an arithmetic number, because the mean of its divisors is an integer number (1791600).

Almost surely, 2^7150991 is an apocalyptic number.

7150991 is a deficient number, since it is larger than the sum of its proper divisors (15409).

7150991 is a wasteful number, since it uses less digits than its factorization.

7150991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15408.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 7150991 is about 2674.1336914971. The cubic root of 7150991 is about 192.6587524969.

The spelling of 7150991 in words is "seven million, one hundred fifty thousand, nine hundred ninety-one".