7699969 has 4 divisors (see below), whose sum is σ = 7826260. Its totient is φ = 7573680.

The previous prime is 7699961. The next prime is 7699973. The reversal of 7699969 is 9699967.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9699967 = 163 ⋅59509.

It can be written as a sum of positive squares in 2 ways, for example, as 608400 + 7091569 = 780^2 + 2663^2 .

It is a cyclic number.

It is not a de Polignac number, because 7699969 - 2³ = 7699961 is a prime.

It is a super-2 number, since 2×7699969² = 118579045201922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

7699969 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7699961) 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, 63054 + ... + 63175.

It is an arithmetic number, because the mean of its divisors is an integer number (1956565).

Almost surely, 2^7699969 is an apocalyptic number.

It is an amenable number.

7699969 is a deficient number, since it is larger than the sum of its proper divisors (126291).

7699969 is a wasteful number, since it uses less digits than its factorization.

7699969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126290.

The product of its digits is 1653372, while the sum is 55.

The square root of 7699969 is about 2774.8817992844. The cubic root of 7699969 is about 197.4678172204.

It can be divided in two parts, 7699 and 969, that added together give a palindrome (8668).

The spelling of 7699969 in words is "seven million, six hundred ninety-nine thousand, nine hundred sixty-nine".