3721690057 has 4 divisors (see below), whose sum is σ = 3721917060. Its totient is φ = 3721463056.

The previous prime is 3721690043. The next prime is 3721690061. The reversal of 3721690057 is 7500961273.

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 1863735241 + 1857954816 = 43171^2 + 43104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3721690057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3721690067) 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, 86818 + ... + 122395.

It is an arithmetic number, because the mean of its divisors is an integer number (930479265).

Almost surely, 2^3721690057 is an apocalyptic number.

It is an amenable number.

3721690057 is a deficient number, since it is larger than the sum of its proper divisors (227003).

3721690057 is a wasteful number, since it uses less digits than its factorization.

3721690057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227002.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 3721690057 is about 61005.6559427075. The cubic root of 3721690057 is about 1549.6967921651.

The spelling of 3721690057 in words is "three billion, seven hundred twenty-one million, six hundred ninety thousand, fifty-seven".