694021444 has 6 divisors (see below), whose sum is σ = 1214537534. Its totient is φ = 347010720.

The previous prime is 694021441. The next prime is 694021451. The reversal of 694021444 is 444120496.

It can be written as a sum of positive squares in only one way, i.e., 401200900 + 292820544 = 20030^2 + 17112^2 .

It is not an unprimeable number, because it can be changed into a prime (694021441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86752677 + ... + 86752684.

Almost surely, 2^694021444 is an apocalyptic number.

It is an amenable number.

694021444 is a deficient number, since it is larger than the sum of its proper divisors (520516090).

694021444 is a wasteful number, since it uses less digits than its factorization.

694021444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173505365 (or 173505363 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 694021444 is about 26344.2867430492. The cubic root of 694021444 is about 885.3689691140.

The spelling of 694021444 in words is "six hundred ninety-four million, twenty-one thousand, four hundred forty-four".