36391947 has 4 divisors (see below), whose sum is σ = 48522600. Its totient is φ = 24261296.

The previous prime is 36391937. The next prime is 36391961. The reversal of 36391947 is 74919363.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36391947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 36391899 and 36391908.

It is not an unprimeable number, because it can be changed into a prime (36391937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6065322 + ... + 6065327.

It is an arithmetic number, because the mean of its divisors is an integer number (12130650).

Almost surely, 2^36391947 is an apocalyptic number.

36391947 is a deficient number, since it is larger than the sum of its proper divisors (12130653).

36391947 is a wasteful number, since it uses less digits than its factorization.

36391947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12130652.

The product of its digits is 122472, while the sum is 42.

The square root of 36391947 is about 6032.5738288064. The cubic root of 36391947 is about 331.3867174106.

The spelling of 36391947 in words is "thirty-six million, three hundred ninety-one thousand, nine hundred forty-seven".