969139693 has 4 divisors (see below), whose sum is σ = 969939868. Its totient is φ = 968339520.

The previous prime is 969139687. The next prime is 969139697. The reversal of 969139693 is 396931969.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 396931969 = 7 ⋅56704567.

It can be written as a sum of positive squares in 2 ways, for example, as 216295849 + 752843844 = 14707^2 + 27438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-969139693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (969139697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398268 + ... + 400693.

It is an arithmetic number, because the mean of its divisors is an integer number (242484967).

Almost surely, 2^969139693 is an apocalyptic number.

It is an amenable number.

969139693 is a deficient number, since it is larger than the sum of its proper divisors (800175).

969139693 is a wasteful number, since it uses less digits than its factorization.

969139693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800174.

The product of its digits is 2125764, while the sum is 55.

The square root of 969139693 is about 31131.0085445364. The cubic root of 969139693 is about 989.6055609912.

The spelling of 969139693 in words is "nine hundred sixty-nine million, one hundred thirty-nine thousand, six hundred ninety-three".