73689947 has 2 divisors, whose sum is σ = 73689948. Its totient is φ = 73689946.

The previous prime is 73689943. The next prime is 73689983. The reversal of 73689947 is 74998637.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 73689947 - 2² = 73689943 is a prime.

It is not a weakly prime, because it can be changed into another prime (73689943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36844973 + 36844974.

It is an arithmetic number, because the mean of its divisors is an integer number (36844974).

Almost surely, 2^73689947 is an apocalyptic number.

73689947 is a deficient number, since it is larger than the sum of its proper divisors (1).

73689947 is an equidigital number, since it uses as much as digits as its factorization.

73689947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 53.

The square root of 73689947 is about 8584.2848857665. The cubic root of 73689947 is about 419.2464701260.

The spelling of 73689947 in words is "seventy-three million, six hundred eighty-nine thousand, nine hundred forty-seven".