696216121 has 8 divisors (see below), whose sum is σ = 715010184. Its totient is φ = 677508480.

The previous prime is 696216091. The next prime is 696216127. The reversal of 696216121 is 121612696.

It can be written as a sum of positive squares in 4 ways, for example, as 1155625 + 695060496 = 1075^2 + 26364^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 696216121 - 2²¹ = 694118969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (696216127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5110 + ... + 37663.

It is an arithmetic number, because the mean of its divisors is an integer number (89376273).

Almost surely, 2^696216121 is an apocalyptic number.

It is an amenable number.

696216121 is a deficient number, since it is larger than the sum of its proper divisors (18794063).

696216121 is a wasteful number, since it uses less digits than its factorization.

696216121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43211.

The product of its digits is 7776, while the sum is 34.

The square root of 696216121 is about 26385.9076213042. The cubic root of 696216121 is about 886.3012430493.

The spelling of 696216121 in words is "six hundred ninety-six million, two hundred sixteen thousand, one hundred twenty-one".