36403621 has 2 divisors, whose sum is σ = 36403622. Its totient is φ = 36403620.

The previous prime is 36403607. The next prime is 36403637. The reversal of 36403621 is 12630463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35224225 + 1179396 = 5935^2 + 1086^2 .

It is an emirp because it is prime and its reverse (12630463) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36403621 - 2⁵ = 36403589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36403651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18201810 + 18201811.

It is an arithmetic number, because the mean of its divisors is an integer number (18201811).

Almost surely, 2^36403621 is an apocalyptic number.

It is an amenable number.

36403621 is a deficient number, since it is larger than the sum of its proper divisors (1).

36403621 is an equidigital number, since it uses as much as digits as its factorization.

36403621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 36403621 is about 6033.5413315896. The cubic root of 36403621 is about 331.4221482798.

The spelling of 36403621 in words is "thirty-six million, four hundred three thousand, six hundred twenty-one".