7001391 has 4 divisors (see below), whose sum is σ = 9335192. Its totient is φ = 4667592.

The previous prime is 7001387. The next prime is 7001411. The reversal of 7001391 is 1931007.

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

It is not a de Polignac number, because 7001391 - 2² = 7001387 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 (7001311) 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, 1166896 + ... + 1166901.

It is an arithmetic number, because the mean of its divisors is an integer number (2333798).

Almost surely, 2^7001391 is an apocalyptic number.

7001391 is a deficient number, since it is larger than the sum of its proper divisors (2333801).

7001391 is a wasteful number, since it uses less digits than its factorization.

7001391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333800.

The product of its (nonzero) digits is 189, while the sum is 21.

The square root of 7001391 is about 2646.0141722976. The cubic root of 7001391 is about 191.3057883298.

Adding to 7001391 its reverse (1931007), we get a palindrome (8932398).

The spelling of 7001391 in words is "seven million, one thousand, three hundred ninety-one".