694143293 has 8 divisors (see below), whose sum is σ = 700860600. Its totient is φ = 687436288.

The previous prime is 694143253. The next prime is 694143299. The reversal of 694143293 is 392341496.

It can be written as a sum of positive squares in 4 ways, for example, as 145974724 + 548168569 = 12082^2 + 23413^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-694143293 is a prime.

It is a super-2 number, since 2×694143293² = 963669822433767698, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 694143293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694143299) 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, 232313 + ... + 235281.

It is an arithmetic number, because the mean of its divisors is an integer number (87607575).

Almost surely, 2^694143293 is an apocalyptic number.

It is an amenable number.

694143293 is a deficient number, since it is larger than the sum of its proper divisors (6717307).

694143293 is a wasteful number, since it uses less digits than its factorization.

694143293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151.

The product of its digits is 139968, while the sum is 41.

The square root of 694143293 is about 26346.5992682168. The cubic root of 694143293 is about 885.4207806785.

The spelling of 694143293 in words is "six hundred ninety-four million, one hundred forty-three thousand, two hundred ninety-three".