7640767 has 2 divisors, whose sum is σ = 7640768. Its totient is φ = 7640766.

The previous prime is 7640749. The next prime is 7640771. The reversal of 7640767 is 7670467.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7640767 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7640707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820383 + 3820384.

It is an arithmetic number, because the mean of its divisors is an integer number (3820384).

Almost surely, 2^7640767 is an apocalyptic number.

7640767 is a deficient number, since it is larger than the sum of its proper divisors (1).

7640767 is an equidigital number, since it uses as much as digits as its factorization.

7640767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 7640767 is about 2764.1937341655. The cubic root of 7640767 is about 196.9604307825.

The spelling of 7640767 in words is "seven million, six hundred forty thousand, seven hundred sixty-seven".