94720009 has 2 divisors, whose sum is σ = 94720010. Its totient is φ = 94720008.

The previous prime is 94720001. The next prime is 94720027. The reversal of 94720009 is 90002749.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78943225 + 15776784 = 8885^2 + 3972^2 .

It is a cyclic number.

It is not a de Polignac number, because 94720009 - 2³ = 94720001 is a prime.

It is not a weakly prime, because it can be changed into another prime (94720001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47360004 + 47360005.

It is an arithmetic number, because the mean of its divisors is an integer number (47360005).

Almost surely, 2^94720009 is an apocalyptic number.

It is an amenable number.

94720009 is a deficient number, since it is larger than the sum of its proper divisors (1).

94720009 is an equidigital number, since it uses as much as digits as its factorization.

94720009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 94720009 is about 9732.4205108493. The cubic root of 94720009 is about 455.8415516620.

The spelling of 94720009 in words is "ninety-four million, seven hundred twenty thousand, nine".