73803661 has 2 divisors, whose sum is σ = 73803662. Its totient is φ = 73803660.

The previous prime is 73803643. The next prime is 73803671. The reversal of 73803661 is 16630837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70879561 + 2924100 = 8419^2 + 1710^2 .

It is a cyclic number.

It is not a de Polignac number, because 73803661 - 2⁷ = 73803533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73803601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36901830 + 36901831.

It is an arithmetic number, because the mean of its divisors is an integer number (36901831).

Almost surely, 2^73803661 is an apocalyptic number.

It is an amenable number.

73803661 is a deficient number, since it is larger than the sum of its proper divisors (1).

73803661 is an equidigital number, since it uses as much as digits as its factorization.

73803661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 73803661 is about 8590.9057147661. The cubic root of 73803661 is about 419.4620114736.

The spelling of 73803661 in words is "seventy-three million, eight hundred three thousand, six hundred sixty-one".