3690529921 has 4 divisors (see below), whose sum is σ = 3974416852. Its totient is φ = 3406642992.

The previous prime is 3690529919. The next prime is 3690529933. The reversal of 3690529921 is 1299250963.

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 2373638400 + 1316891521 = 48720^2 + 36289^2 .

It is a cyclic number.

It is not a de Polignac number, because 3690529921 - 2¹ = 3690529919 is a prime.

It is a super-2 number, since 2×3690529921² = 27240022195592532482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3690529021) 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, 141943446 + ... + 141943471.

It is an arithmetic number, because the mean of its divisors is an integer number (993604213).

Almost surely, 2^3690529921 is an apocalyptic number.

It is an amenable number.

3690529921 is a deficient number, since it is larger than the sum of its proper divisors (283886931).

3690529921 is a wasteful number, since it uses less digits than its factorization.

3690529921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283886930.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 3690529921 is about 60749.7318594905. The cubic root of 3690529921 is about 1545.3596801213.

The spelling of 3690529921 in words is "three billion, six hundred ninety million, five hundred twenty-nine thousand, nine hundred twenty-one".