36638797 has 4 divisors (see below), whose sum is σ = 39457180. Its totient is φ = 33820416.

The previous prime is 36638761. The next prime is 36638813. The reversal of 36638797 is 79783663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79783663 = 41 ⋅1945943.

It can be written as a sum of positive squares in 2 ways, for example, as 6728836 + 29909961 = 2594^2 + 5469^2 .

It is a cyclic number.

It is not a de Polignac number, because 36638797 - 2¹¹ = 36636749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 36638797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36638737) 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, 1409172 + ... + 1409197.

It is an arithmetic number, because the mean of its divisors is an integer number (9864295).

Almost surely, 2^36638797 is an apocalyptic number.

It is an amenable number.

36638797 is a deficient number, since it is larger than the sum of its proper divisors (2818383).

36638797 is a wasteful number, since it uses less digits than its factorization.

36638797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818382.

The product of its digits is 1143072, while the sum is 49.

The square root of 36638797 is about 6052.9990087559. Note that the first 3 decimals coincide. The cubic root of 36638797 is about 332.1343053896.

The spelling of 36638797 in words is "thirty-six million, six hundred thirty-eight thousand, seven hundred ninety-seven".