693278121 has 16 divisors (see below), whose sum is σ = 986996736. Its totient is φ = 431807376.

The previous prime is 693278101. The next prime is 693278129. The reversal of 693278121 is 121872396.

It is not a de Polignac number, because 693278121 - 2¹⁰ = 693277097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 693278121.

It is not an unprimeable number, because it can be changed into a prime (693278129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113865 + ... + 119798.

It is an arithmetic number, because the mean of its divisors is an integer number (61687296).

Almost surely, 2^693278121 is an apocalyptic number.

It is an amenable number.

693278121 is a deficient number, since it is larger than the sum of its proper divisors (293718615).

693278121 is a wasteful number, since it uses less digits than its factorization.

693278121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233732.

The product of its digits is 36288, while the sum is 39.

The square root of 693278121 is about 26330.1751038613. The cubic root of 693278121 is about 885.0527684071.

The spelling of 693278121 in words is "six hundred ninety-three million, two hundred seventy-eight thousand, one hundred twenty-one".