94720661 has 4 divisors (see below), whose sum is σ = 108252192. Its totient is φ = 81189132.

The previous prime is 94720657. The next prime is 94720663. The reversal of 94720661 is 16602749.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16602749 = 541 ⋅30689.

It is a cyclic number.

It is not a de Polignac number, because 94720661 - 2² = 94720657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (94720663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6765755 + ... + 6765768.

It is an arithmetic number, because the mean of its divisors is an integer number (27063048).

Almost surely, 2^94720661 is an apocalyptic number.

It is an amenable number.

94720661 is a deficient number, since it is larger than the sum of its proper divisors (13531531).

94720661 is a wasteful number, since it uses less digits than its factorization.

94720661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13531530.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 94720661 is about 9732.4540070837. The cubic root of 94720661 is about 455.8425975797.

The spelling of 94720661 in words is "ninety-four million, seven hundred twenty thousand, six hundred sixty-one".