694090541 has 4 divisors (see below), whose sum is σ = 694202652. Its totient is φ = 693978432.

The previous prime is 694090493. The next prime is 694090543. The reversal of 694090541 is 145090496.

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

It can be written as a sum of positive squares in 2 ways, for example, as 671328100 + 22762441 = 25910^2 + 4771^2 .

It is a cyclic number.

It is not a de Polignac number, because 694090541 - 2¹⁸ = 693828397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 694090495 and 694090504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694090543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46190 + ... + 59343.

It is an arithmetic number, because the mean of its divisors is an integer number (173550663).

Almost surely, 2^694090541 is an apocalyptic number.

It is an amenable number.

694090541 is a deficient number, since it is larger than the sum of its proper divisors (112111).

694090541 is a wasteful number, since it uses less digits than its factorization.

694090541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112110.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 694090541 is about 26345.5981332746. The cubic root of 694090541 is about 885.3983506794.

The spelling of 694090541 in words is "six hundred ninety-four million, ninety thousand, five hundred forty-one".