9690442791 has 4 divisors (see below), whose sum is σ = 12920590392. Its totient is φ = 6460295192.

The previous prime is 9690442789. The next prime is 9690442813. The reversal of 9690442791 is 1972440969.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9690442791 - 2¹ = 9690442789 is a prime.

It is a super-4 number, since 4×9690442791⁴ (a number of 41 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9690442781) 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, 1615073796 + ... + 1615073801.

It is an arithmetic number, because the mean of its divisors is an integer number (3230147598).

Almost surely, 2^9690442791 is an apocalyptic number.

9690442791 is a deficient number, since it is larger than the sum of its proper divisors (3230147601).

9690442791 is a wasteful number, since it uses less digits than its factorization.

9690442791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230147600.

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 9690442791 is about 98440.0466832478. The cubic root of 9690442791 is about 2131.9705797497.

The spelling of 9690442791 in words is "nine billion, six hundred ninety million, four hundred forty-two thousand, seven hundred ninety-one".