35720161 has 4 divisors (see below), whose sum is σ = 35750592. Its totient is φ = 35689732.

The previous prime is 35720149. The next prime is 35720183. The reversal of 35720161 is 16102753.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-35720161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (35720101) 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, 13381 + ... + 15826.

It is an arithmetic number, because the mean of its divisors is an integer number (8937648).

Almost surely, 2^35720161 is an apocalyptic number.

It is an amenable number.

35720161 is a deficient number, since it is larger than the sum of its proper divisors (30431).

35720161 is a wasteful number, since it uses less digits than its factorization.

35720161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30430.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 35720161 is about 5976.6345881273. The cubic root of 35720161 is about 329.3349354343.

The spelling of 35720161 in words is "thirty-five million, seven hundred twenty thousand, one hundred sixty-one".