3685421091 has 32 divisors (see below), whose sum is σ = 5475548160. Its totient is φ = 2185913600.

The previous prime is 3685421087. The next prime is 3685421099. The reversal of 3685421091 is 1901245863.

It is a cyclic number.

It is not a de Polignac number, because 3685421091 - 2² = 3685421087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3685421099) 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, 751375 + ... + 756263.

It is an arithmetic number, because the mean of its divisors is an integer number (171110880).

Almost surely, 2^3685421091 is an apocalyptic number.

3685421091 is a deficient number, since it is larger than the sum of its proper divisors (1790127069).

3685421091 is a wasteful number, since it uses less digits than its factorization.

3685421091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5387.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 3685421091 is about 60707.6691283729. The cubic root of 3685421091 is about 1544.6462662489.

The spelling of 3685421091 in words is "three billion, six hundred eighty-five million, four hundred twenty-one thousand, ninety-one".