36903721 has 2 divisors, whose sum is σ = 36903722. Its totient is φ = 36903720.

The previous prime is 36903701. The next prime is 36903739. The reversal of 36903721 is 12730963.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32947600 + 3956121 = 5740^2 + 1989^2 .

It is a cyclic number.

It is not a de Polignac number, because 36903721 - 2¹¹ = 36901673 is a prime.

It is not a weakly prime, because it can be changed into another prime (36903701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18451860 + 18451861.

It is an arithmetic number, because the mean of its divisors is an integer number (18451861).

Almost surely, 2^36903721 is an apocalyptic number.

It is an amenable number.

36903721 is a deficient number, since it is larger than the sum of its proper divisors (1).

36903721 is an equidigital number, since it uses as much as digits as its factorization.

36903721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 36903721 is about 6074.8432901598. The cubic root of 36903721 is about 332.9329043848.

The spelling of 36903721 in words is "thirty-six million, nine hundred three thousand, seven hundred twenty-one".