3699561 has 4 divisors (see below), whose sum is σ = 4932752. Its totient is φ = 2466372.

The previous prime is 3699533. The next prime is 3699583. The reversal of 3699561 is 1659963.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3699561 - 2⁶ = 3699497 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3699961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616591 + ... + 616596.

It is an arithmetic number, because the mean of its divisors is an integer number (1233188).

Almost surely, 2^3699561 is an apocalyptic number.

It is an amenable number.

3699561 is a deficient number, since it is larger than the sum of its proper divisors (1233191).

3699561 is a wasteful number, since it uses less digits than its factorization.

3699561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233190.

The product of its digits is 43740, while the sum is 39.

The square root of 3699561 is about 1923.4242901658. The cubic root of 3699561 is about 154.6619200841.

The spelling of 3699561 in words is "three million, six hundred ninety-nine thousand, five hundred sixty-one".