94390721 has 4 divisors (see below), whose sum is σ = 96171732. Its totient is φ = 92609712.

The previous prime is 94390687. The next prime is 94390741. The reversal of 94390721 is 12709349.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50566321 + 43824400 = 7111^2 + 6620^2 .

It is a cyclic number.

It is not a de Polignac number, because 94390721 - 2⁶ = 94390657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (94390741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890426 + ... + 890531.

It is an arithmetic number, because the mean of its divisors is an integer number (24042933).

Almost surely, 2^94390721 is an apocalyptic number.

It is an amenable number.

94390721 is a deficient number, since it is larger than the sum of its proper divisors (1781011).

94390721 is a wasteful number, since it uses less digits than its factorization.

94390721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781010.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 94390721 is about 9715.4887164774. The cubic root of 94390721 is about 455.3127037713.

The spelling of 94390721 in words is "ninety-four million, three hundred ninety thousand, seven hundred twenty-one".