696966639 has 4 divisors (see below), whose sum is σ = 929288856. Its totient is φ = 464644424.

The previous prime is 696966617. The next prime is 696966659. The reversal of 696966639 is 936669696.

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 696966639 - 2⁷ = 696966511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (696966659) 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, 116161104 + ... + 116161109.

It is an arithmetic number, because the mean of its divisors is an integer number (232322214).

Almost surely, 2^696966639 is an apocalyptic number.

696966639 is a deficient number, since it is larger than the sum of its proper divisors (232322217).

696966639 is a wasteful number, since it uses less digits than its factorization.

696966639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232322216.

The product of its digits is 17006112, while the sum is 60.

The square root of 696966639 is about 26400.1257383369. The cubic root of 696966639 is about 886.6196049952.

The spelling of 696966639 in words is "six hundred ninety-six million, nine hundred sixty-six thousand, six hundred thirty-nine".