35736721 has 4 divisors (see below), whose sum is σ = 35749744. Its totient is φ = 35723700.

The previous prime is 35736697. The next prime is 35736773. The reversal of 35736721 is 12763753.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12763753 = 17 ⋅750809.

It is a cyclic number.

It is not a de Polignac number, because 35736721 - 2⁵ = 35736689 is a prime.

It is a super-2 number, since 2×35736721² = 2554226455663682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (35733721) 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, 615 + ... + 8476.

It is an arithmetic number, because the mean of its divisors is an integer number (8937436).

Almost surely, 2^35736721 is an apocalyptic number.

It is an amenable number.

35736721 is a deficient number, since it is larger than the sum of its proper divisors (13023).

35736721 is an equidigital number, since it uses as much as digits as its factorization.

35736721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13022.

The product of its digits is 26460, while the sum is 34.

The square root of 35736721 is about 5978.0198226503. The cubic root of 35736721 is about 329.3858212067.

The spelling of 35736721 in words is "thirty-five million, seven hundred thirty-six thousand, seven hundred twenty-one".