73694989 has 2 divisors, whose sum is σ = 73694990. Its totient is φ = 73694988.

The previous prime is 73694987. The next prime is 73694993. The reversal of 73694989 is 98949637.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73239364 + 455625 = 8558^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 73694989 - 2¹ = 73694987 is a prime.

Together with 73694987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73694981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36847494 + 36847495.

It is an arithmetic number, because the mean of its divisors is an integer number (36847495).

Almost surely, 2^73694989 is an apocalyptic number.

It is an amenable number.

73694989 is a deficient number, since it is larger than the sum of its proper divisors (1).

73694989 is an equidigital number, since it uses as much as digits as its factorization.

73694989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 55.

The square root of 73694989 is about 8584.5785569240. The cubic root of 73694989 is about 419.2560317763.

The spelling of 73694989 in words is "seventy-three million, six hundred ninety-four thousand, nine hundred eighty-nine".