7540991 has 2 divisors, whose sum is σ = 7540992. Its totient is φ = 7540990.

The previous prime is 7540969. The next prime is 7540993. The reversal of 7540991 is 1990457.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7540991 - 2¹⁸ = 7278847 is a prime.

Together with 7540993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7540993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3770495 + 3770496.

It is an arithmetic number, because the mean of its divisors is an integer number (3770496).

Almost surely, 2^7540991 is an apocalyptic number.

7540991 is a deficient number, since it is larger than the sum of its proper divisors (1).

7540991 is an equidigital number, since it uses as much as digits as its factorization.

7540991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 7540991 is about 2746.0864880772. The cubic root of 7540991 is about 196.0993439879.

The spelling of 7540991 in words is "seven million, five hundred forty thousand, nine hundred ninety-one".