35943988921 has 9 divisors (see below), whose sum is σ = 37579277029. Its totient is φ = 34377035836.

The previous prime is 35943988889. The next prime is 35943988931. The reversal of 35943988921 is 12988934953.

The square root of 35943988921 is 189589.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 35943988921 - 2⁵ = 35943988889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 35943988921.

It is not an unprimeable number, because it can be changed into a prime (35943988931) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4356426 + ... + 4364668.

Almost surely, 2^35943988921 is an apocalyptic number.

35943988921 is the 189589-th square number.

35943988921 is the 94795-th centered octagonal number.

It is an amenable number.

35943988921 is a deficient number, since it is larger than the sum of its proper divisors (1635288108).

35943988921 is an frugal number, since it uses more digits than its factorization.

35943988921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16532 (or 8266 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 61.

The spelling of 35943988921 in words is "thirty-five billion, nine hundred forty-three million, nine hundred eighty-eight thousand, nine hundred twenty-one".