7879402697 has 4 divisors (see below), whose sum is σ = 7912097556. Its totient is φ = 7846707840.

The previous prime is 7879402667. The next prime is 7879402759. The reversal of 7879402697 is 7962049787.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3558838336 + 4320564361 = 59656^2 + 65731^2 .

It is a cyclic number.

It is not a de Polignac number, because 7879402697 - 2⁶ = 7879402633 is a prime.

It is a super-2 number, since 2×7879402697² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7879402637) 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, 16347068 + ... + 16347549.

It is an arithmetic number, because the mean of its divisors is an integer number (1978024389).

Almost surely, 2^7879402697 is an apocalyptic number.

It is an amenable number.

7879402697 is a deficient number, since it is larger than the sum of its proper divisors (32694859).

7879402697 is a wasteful number, since it uses less digits than its factorization.

7879402697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32694858.

The product of its (nonzero) digits is 10668672, while the sum is 59.

The square root of 7879402697 is about 88765.9996676655. Note that the first 3 decimals coincide. The cubic root of 7879402697 is about 1989.8992985413.

Adding to 7879402697 its sum of digits (59), we get a square (7879402756 = 88766²).

The spelling of 7879402697 in words is "seven billion, eight hundred seventy-nine million, four hundred two thousand, six hundred ninety-seven".