7901669 has 2 divisors, whose sum is σ = 7901670. Its totient is φ = 7901668.

The previous prime is 7901603. The next prime is 7901671. The reversal of 7901669 is 9661097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4571044 + 3330625 = 2138^2 + 1825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7901669 is a prime.

It is a super-2 number, since 2×7901669² = 124872745971122, which contains 22 as substring.

Together with 7901671, 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 (7903669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3950834 + 3950835.

It is an arithmetic number, because the mean of its divisors is an integer number (3950835).

Almost surely, 2^7901669 is an apocalyptic number.

It is an amenable number.

7901669 is a deficient number, since it is larger than the sum of its proper divisors (1).

7901669 is an equidigital number, since it uses as much as digits as its factorization.

7901669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 7901669 is about 2810.9907506073. The cubic root of 7901669 is about 199.1771945984.

The spelling of 7901669 in words is "seven million, nine hundred one thousand, six hundred sixty-nine".