694987641 has 16 divisors (see below), whose sum is σ = 1030573120. Its totient is φ = 462892320.

The previous prime is 694987603. The next prime is 694987669. The reversal of 694987641 is 146789496.

It is not a de Polignac number, because 694987641 - 2¹⁴ = 694971257 is a prime.

It is a super-3 number, since 3×694987641³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (694987141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18861 + ... + 41781.

It is an arithmetic number, because the mean of its divisors is an integer number (64410820).

Almost surely, 2^694987641 is an apocalyptic number.

It is an amenable number.

694987641 is a deficient number, since it is larger than the sum of its proper divisors (335585479).

694987641 is a wasteful number, since it uses less digits than its factorization.

694987641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24053 (or 24047 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 694987641 is about 26362.6182500904. The cubic root of 694987641 is about 885.7796404664.

The spelling of 694987641 in words is "six hundred ninety-four million, nine hundred eighty-seven thousand, six hundred forty-one".