36865819 has 4 divisors (see below), whose sum is σ = 36885096. Its totient is φ = 36846544.

The previous prime is 36865811. The next prime is 36865823. The reversal of 36865819 is 91856863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91856863 = 7 ⋅13122409.

It is a cyclic number.

It is not a de Polignac number, because 36865819 - 2³ = 36865811 is a prime.

It is a super-2 number, since 2×36865819² = 2718177221081522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36865811) 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, 6409 + ... + 10714.

It is an arithmetic number, because the mean of its divisors is an integer number (9221274).

Almost surely, 2^36865819 is an apocalyptic number.

36865819 is a deficient number, since it is larger than the sum of its proper divisors (19277).

36865819 is a wasteful number, since it uses less digits than its factorization.

36865819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19276.

The product of its digits is 311040, while the sum is 46.

The square root of 36865819 is about 6071.7229021094. The cubic root of 36865819 is about 332.8188856615.

The spelling of 36865819 in words is "thirty-six million, eight hundred sixty-five thousand, eight hundred nineteen".