7643669 has 4 divisors (see below), whose sum is σ = 8338560. Its totient is φ = 6948780.

The previous prime is 7643663. The next prime is 7643677. The reversal of 7643669 is 9663467.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7643669 - 2⁸ = 7643413 is a prime.

It is a super-2 number, since 2×7643669² = 116851351563122, which contains 22 as substring.

It is a d-powerful number, because it can be written as 7⁸ + 6³ + 4⁶ + 3¹³ + 6³ + 6⁷ + 9² .

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7643663) 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, 347429 + ... + 347450.

It is an arithmetic number, because the mean of its divisors is an integer number (2084640).

Almost surely, 2^7643669 is an apocalyptic number.

It is an amenable number.

7643669 is a deficient number, since it is larger than the sum of its proper divisors (694891).

7643669 is a wasteful number, since it uses less digits than its factorization.

7643669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694890.

The product of its digits is 163296, while the sum is 41.

The square root of 7643669 is about 2764.7186113599. The cubic root of 7643669 is about 196.9853631322.

The spelling of 7643669 in words is "seven million, six hundred forty-three thousand, six hundred sixty-nine".