93643661 has 2 divisors, whose sum is σ = 93643662. Its totient is φ = 93643660.

The previous prime is 93643657. The next prime is 93643709. The reversal of 93643661 is 16634639.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80820100 + 12823561 = 8990^2 + 3581^2 .

It is a cyclic number.

It is not a de Polignac number, because 93643661 - 2² = 93643657 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93643651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46821830 + 46821831.

It is an arithmetic number, because the mean of its divisors is an integer number (46821831).

Almost surely, 2^93643661 is an apocalyptic number.

It is an amenable number.

93643661 is a deficient number, since it is larger than the sum of its proper divisors (1).

93643661 is an equidigital number, since it uses as much as digits as its factorization.

93643661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 38.

The square root of 93643661 is about 9676.9654851095. The cubic root of 93643661 is about 454.1083225260.

The spelling of 93643661 in words is "ninety-three million, six hundred forty-three thousand, six hundred sixty-one".