36857881 has 2 divisors, whose sum is σ = 36857882. Its totient is φ = 36857880.

The previous prime is 36857833. The next prime is 36857939. The reversal of 36857881 is 18875863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34105600 + 2752281 = 5840^2 + 1659^2 .

It is a cyclic number.

It is not a de Polignac number, because 36857881 - 2²¹ = 34760729 is a prime.

It is a super-2 number, since 2×36857881² = 2717006783620322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (36857801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18428940 + 18428941.

It is an arithmetic number, because the mean of its divisors is an integer number (18428941).

Almost surely, 2^36857881 is an apocalyptic number.

It is an amenable number.

36857881 is a deficient number, since it is larger than the sum of its proper divisors (1).

36857881 is an equidigital number, since it uses as much as digits as its factorization.

36857881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 46.

The square root of 36857881 is about 6071.0691809598. The cubic root of 36857881 is about 332.7949962699.

The spelling of 36857881 in words is "thirty-six million, eight hundred fifty-seven thousand, eight hundred eighty-one".