73601989 has 2 divisors, whose sum is σ = 73601990. Its totient is φ = 73601988.

The previous prime is 73601921. The next prime is 73602037. The reversal of 73601989 is 98910637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66552964 + 7049025 = 8158^2 + 2655^2 .

It is a cyclic number.

It is not a de Polignac number, because 73601989 - 2²¹ = 71504837 is a prime.

It is a super-2 number, since 2×73601989² = 10834505569512242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73601089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36800994 + 36800995.

It is an arithmetic number, because the mean of its divisors is an integer number (36800995).

Almost surely, 2^73601989 is an apocalyptic number.

It is an amenable number.

73601989 is a deficient number, since it is larger than the sum of its proper divisors (1).

73601989 is an equidigital number, since it uses as much as digits as its factorization.

73601989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 73601989 is about 8579.1601570317. The cubic root of 73601989 is about 419.0795963334.

The spelling of 73601989 in words is "seventy-three million, six hundred one thousand, nine hundred eighty-nine".