7961442697 has 4 divisors (see below), whose sum is σ = 8573861380. Its totient is φ = 7349024016.

The previous prime is 7961442691. The next prime is 7961442739. The reversal of 7961442697 is 7962441697.

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 1977491961 + 5983950736 = 44469^2 + 77356^2 .

It is a cyclic number.

It is not a de Polignac number, because 7961442697 - 2³¹ = 5813959049 is a prime.

It is a super-2 number, since 2×7961442697² (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 (7961442691) 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, 306209322 + ... + 306209347.

It is an arithmetic number, because the mean of its divisors is an integer number (2143465345).

Almost surely, 2^7961442697 is an apocalyptic number.

It is an amenable number.

7961442697 is a deficient number, since it is larger than the sum of its proper divisors (612418683).

7961442697 is a wasteful number, since it uses less digits than its factorization.

7961442697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612418682.

The product of its digits is 4572288, while the sum is 55.

The square root of 7961442697 is about 89226.9168861056. The cubic root of 7961442697 is about 1996.7817155169.

The spelling of 7961442697 in words is "seven billion, nine hundred sixty-one million, four hundred forty-two thousand, six hundred ninety-seven".