36635861 has 2 divisors, whose sum is σ = 36635862. Its totient is φ = 36635860.

The previous prime is 36635821. The next prime is 36635887. The reversal of 36635861 is 16853663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24068836 + 12567025 = 4906^2 + 3545^2 .

It is a cyclic number.

It is not a de Polignac number, because 36635861 - 2¹⁴ = 36619477 is a prime.

It is a super-2 number, since 2×36635861² = 2684372622422642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36635821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18317930 + 18317931.

It is an arithmetic number, because the mean of its divisors is an integer number (18317931).

Almost surely, 2^36635861 is an apocalyptic number.

It is an amenable number.

36635861 is a deficient number, since it is larger than the sum of its proper divisors (1).

36635861 is an equidigital number, since it uses as much as digits as its factorization.

36635861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 36635861 is about 6052.7564794893. The cubic root of 36635861 is about 332.1254334428.

It can be divided in two parts, 366 and 35861, that multiplied together give a triangular number (13125126 = T₅₁₂₃).

The spelling of 36635861 in words is "thirty-six million, six hundred thirty-five thousand, eight hundred sixty-one".