36999971 has 4 divisors (see below), whose sum is σ = 37381512. Its totient is φ = 36618432.

The previous prime is 36999961. The next prime is 36999979. The reversal of 36999971 is 17999963.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17999963 = 251 ⋅71713.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36999971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36999979) 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, 190625 + ... + 190818.

It is an arithmetic number, because the mean of its divisors is an integer number (9345378).

Almost surely, 2^36999971 is an apocalyptic number.

36999971 is a deficient number, since it is larger than the sum of its proper divisors (381541).

36999971 is an equidigital number, since it uses as much as digits as its factorization.

36999971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381540.

The product of its digits is 826686, while the sum is 53.

The square root of 36999971 is about 6082.7601465124. The cubic root of 36999971 is about 333.2220981065. Note that the first 3 decimals are identical.

The spelling of 36999971 in words is "thirty-six million, nine hundred ninety-nine thousand, nine hundred seventy-one".