693249491 has 4 divisors (see below), whose sum is σ = 756272184. Its totient is φ = 630226800.

The previous prime is 693249461. The next prime is 693249517. The reversal of 693249491 is 194942396.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-693249491 is a prime.

It is a super-3 number, since 3×693249491³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (693249451) 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, 31511330 + ... + 31511351.

It is an arithmetic number, because the mean of its divisors is an integer number (189068046).

Almost surely, 2^693249491 is an apocalyptic number.

693249491 is a deficient number, since it is larger than the sum of its proper divisors (63022693).

693249491 is a wasteful number, since it uses less digits than its factorization.

693249491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63022692.

The product of its digits is 419904, while the sum is 47.

The square root of 693249491 is about 26329.6314254492. The cubic root of 693249491 is about 885.0405850285.

The spelling of 693249491 in words is "six hundred ninety-three million, two hundred forty-nine thousand, four hundred ninety-one".