694780994 has 4 divisors (see below), whose sum is σ = 1042171494. Its totient is φ = 347390496.

The previous prime is 694780993. The next prime is 694781029. The reversal of 694780994 is 499087496.

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

It can be written as a sum of positive squares in only one way, i.e., 580569025 + 114211969 = 24095^2 + 10687^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (694780993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173695247 + ... + 173695250.

Almost surely, 2^694780994 is an apocalyptic number.

694780994 is a deficient number, since it is larger than the sum of its proper divisors (347390500).

694780994 is a wasteful number, since it uses less digits than its factorization.

694780994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347390499.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 694780994 is about 26358.6986401074. The cubic root of 694780994 is about 885.6918394564.

The spelling of 694780994 in words is "six hundred ninety-four million, seven hundred eighty thousand, nine hundred ninety-four".