969399623 has 4 divisors (see below), whose sum is σ = 971588328. Its totient is φ = 967210920.

The previous prime is 969399601. The next prime is 969399637. The reversal of 969399623 is 326993969.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326993969 = 67 ⋅4880507.

It is a cyclic number.

It is not a de Polignac number, because 969399623 - 2²⁰ = 968351047 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 (969399643) 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, 1093688 + ... + 1094573.

It is an arithmetic number, because the mean of its divisors is an integer number (242897082).

Almost surely, 2^969399623 is an apocalyptic number.

969399623 is a deficient number, since it is larger than the sum of its proper divisors (2188705).

969399623 is a wasteful number, since it uses less digits than its factorization.

969399623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188704.

The product of its digits is 4251528, while the sum is 56.

The square root of 969399623 is about 31135.1830410550. The cubic root of 969399623 is about 989.6940261120.

The spelling of 969399623 in words is "nine hundred sixty-nine million, three hundred ninety-nine thousand, six hundred twenty-three".