696542081 has 4 divisors (see below), whose sum is σ = 696599892. Its totient is φ = 696484272.

The previous prime is 696542053. The next prime is 696542089. The reversal of 696542081 is 180245696.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 84474481 + 612067600 = 9191^2 + 24740^2 .

It is a cyclic number.

It is not a de Polignac number, because 696542081 - 2¹⁰ = 696541057 is a prime.

It is a super-2 number, since 2×696542081² = 970341741207621122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (696542089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3230 + ... + 37463.

It is an arithmetic number, because the mean of its divisors is an integer number (174149973).

Almost surely, 2^696542081 is an apocalyptic number.

It is an amenable number.

696542081 is a deficient number, since it is larger than the sum of its proper divisors (57811).

696542081 is a wasteful number, since it uses less digits than its factorization.

696542081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57810.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 696542081 is about 26392.0836805281. The cubic root of 696542081 is about 886.4395399899.

The spelling of 696542081 in words is "six hundred ninety-six million, five hundred forty-two thousand, eighty-one".