35968721 has 4 divisors (see below), whose sum is σ = 36189552. Its totient is φ = 35747892.

The previous prime is 35968717. The next prime is 35968739. The reversal of 35968721 is 12786953.

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 an emirpimes, since its reverse is a distinct semiprime: 12786953 = 43 ⋅297371.

It is a cyclic number.

It is not a de Polignac number, because 35968721 - 2² = 35968717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (35968781) 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, 110171 + ... + 110496.

It is an arithmetic number, because the mean of its divisors is an integer number (9047388).

Almost surely, 2^35968721 is an apocalyptic number.

It is an amenable number.

35968721 is a deficient number, since it is larger than the sum of its proper divisors (220831).

35968721 is a wasteful number, since it uses less digits than its factorization.

35968721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220830.

The product of its digits is 90720, while the sum is 41.

The square root of 35968721 is about 5997.3928502308. The cubic root of 35968721 is about 330.0970666403.

The spelling of 35968721 in words is "thirty-five million, nine hundred sixty-eight thousand, seven hundred twenty-one".