694442381 has 32 divisors (see below), whose sum is σ = 810950400. Its totient is φ = 590768640.

The previous prime is 694442351. The next prime is 694442387. The reversal of 694442381 is 183244496.

It is not a de Polignac number, because 694442381 - 2¹⁴ = 694425997 is a prime.

It is a super-2 number, since 2×694442381² = 964500441057898322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694442387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 468161 + ... + 469641.

It is an arithmetic number, because the mean of its divisors is an integer number (25342200).

Almost surely, 2^694442381 is an apocalyptic number.

It is an amenable number.

694442381 is a deficient number, since it is larger than the sum of its proper divisors (116508019).

694442381 is a wasteful number, since it uses less digits than its factorization.

694442381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589.

The product of its digits is 165888, while the sum is 41.

The square root of 694442381 is about 26352.2746836018. The cubic root of 694442381 is about 885.5479305565.

The spelling of 694442381 in words is "six hundred ninety-four million, four hundred forty-two thousand, three hundred eighty-one".