36499721 has 2 divisors, whose sum is σ = 36499722. Its totient is φ = 36499720.

The previous prime is 36499709. The next prime is 36499739. The reversal of 36499721 is 12799463.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35521600 + 978121 = 5960^2 + 989^2 .

It is a cyclic number.

It is not a de Polignac number, because 36499721 - 2¹⁸ = 36237577 is a prime.

It is not a weakly prime, because it can be changed into another prime (36499621) 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 as a sum of consecutive naturals, namely, 18249860 + 18249861.

It is an arithmetic number, because the mean of its divisors is an integer number (18249861).

Almost surely, 2^36499721 is an apocalyptic number.

It is an amenable number.

36499721 is a deficient number, since it is larger than the sum of its proper divisors (1).

36499721 is an equidigital number, since it uses as much as digits as its factorization.

36499721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 36499721 is about 6041.4998965489. The cubic root of 36499721 is about 331.7135266512.

The spelling of 36499721 in words is "thirty-six million, four hundred ninety-nine thousand, seven hundred twenty-one".