693109121 has 4 divisors (see below), whose sum is σ = 693520212. Its totient is φ = 692698032.

The previous prime is 693109097. The next prime is 693109139. The reversal of 693109121 is 121901396.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 459630721 + 233478400 = 21439^2 + 15280^2 .

It is a cyclic number.

It is not a de Polignac number, because 693109121 - 2¹⁸ = 692846977 is a prime.

It is a super-2 number, since 2×693109121² = 960800507226785282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (693105121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203006 + ... + 206391.

It is an arithmetic number, because the mean of its divisors is an integer number (173380053).

Almost surely, 2^693109121 is an apocalyptic number.

It is an amenable number.

693109121 is a deficient number, since it is larger than the sum of its proper divisors (411091).

693109121 is a wasteful number, since it uses less digits than its factorization.

693109121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411090.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 693109121 is about 26326.9656626053. The cubic root of 693109121 is about 884.9808462983.

The spelling of 693109121 in words is "six hundred ninety-three million, one hundred nine thousand, one hundred twenty-one".