36061981 has 16 divisors (see below), whose sum is σ = 40642560. Its totient is φ = 31795200.

The previous prime is 36061967. The next prime is 36062003. The reversal of 36061981 is 18916063.

It is a cyclic number.

It is not a de Polignac number, because 36061981 - 2⁷ = 36061853 is a prime.

It is a super-2 number, since 2×36061981² = 2600932947288722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36061951) 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 15 ways as a sum of consecutive naturals, for example, 30756 + ... + 31906.

It is an arithmetic number, because the mean of its divisors is an integer number (2540160).

Almost surely, 2^36061981 is an apocalyptic number.

It is an amenable number.

36061981 is a deficient number, since it is larger than the sum of its proper divisors (4580579).

36061981 is a wasteful number, since it uses less digits than its factorization.

36061981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 36061981 is about 6005.1628620713. The cubic root of 36061981 is about 330.3821132347.

The spelling of 36061981 in words is "thirty-six million, sixty-one thousand, nine hundred eighty-one".