7642091 has 4 divisors (see below), whose sum is σ = 7848672. Its totient is φ = 7435512.

The previous prime is 7642069. The next prime is 7642111. The reversal of 7642091 is 1902467.

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

It is a cyclic number.

It is not a de Polignac number, because 7642091 - 2¹⁸ = 7379947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7647091) 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, 103235 + ... + 103308.

It is an arithmetic number, because the mean of its divisors is an integer number (1962168).

Almost surely, 2^7642091 is an apocalyptic number.

7642091 is a deficient number, since it is larger than the sum of its proper divisors (206581).

7642091 is a wasteful number, since it uses less digits than its factorization.

7642091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206580.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 7642091 is about 2764.4332149647. The cubic root of 7642091 is about 196.9718066278.

The spelling of 7642091 in words is "seven million, six hundred forty-two thousand, ninety-one".