36991946 has 4 divisors (see below), whose sum is σ = 55487922. Its totient is φ = 18495972.

The previous prime is 36991943. The next prime is 36991951. The reversal of 36991946 is 64919963.

36991946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 34351321 + 2640625 = 5861^2 + 1625^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 36991946.

It is not an unprimeable number, because it can be changed into a prime (36991943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9247985 + ... + 9247988.

Almost surely, 2^36991946 is an apocalyptic number.

36991946 is a deficient number, since it is larger than the sum of its proper divisors (18495976).

36991946 is a wasteful number, since it uses less digits than its factorization.

36991946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18495975.

The product of its digits is 314928, while the sum is 47.

The square root of 36991946 is about 6082.1004595452. The cubic root of 36991946 is about 333.1980052886.

The spelling of 36991946 in words is "thirty-six million, nine hundred ninety-one thousand, nine hundred forty-six".