94661821 has 4 divisors (see below), whose sum is σ = 96074752. Its totient is φ = 93248892.

The previous prime is 94661773. The next prime is 94661839. The reversal of 94661821 is 12816649.

It is a happy number.

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: 12816649 = 61 ⋅210109.

It is a cyclic number.

It is not a de Polignac number, because 94661821 - 2⁹ = 94661309 is a prime.

It is a super-4 number, since 4×94661821⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (94661891) 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, 706365 + ... + 706498.

It is an arithmetic number, because the mean of its divisors is an integer number (24018688).

Almost surely, 2^94661821 is an apocalyptic number.

It is an amenable number.

94661821 is a deficient number, since it is larger than the sum of its proper divisors (1412931).

94661821 is a wasteful number, since it uses less digits than its factorization.

94661821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412930.

The product of its digits is 20736, while the sum is 37.

The square root of 94661821 is about 9729.4306616574. The cubic root of 94661821 is about 455.7481889824.

The spelling of 94661821 in words is "ninety-four million, six hundred sixty-one thousand, eight hundred twenty-one".