94139861 has 2 divisors, whose sum is σ = 94139862. Its totient is φ = 94139860.

The previous prime is 94139849. The next prime is 94139867. The reversal of 94139861 is 16893149.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68989636 + 25150225 = 8306^2 + 5015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-94139861 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 (94139867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47069930 + 47069931.

It is an arithmetic number, because the mean of its divisors is an integer number (47069931).

Almost surely, 2^94139861 is an apocalyptic number.

It is an amenable number.

94139861 is a deficient number, since it is larger than the sum of its proper divisors (1).

94139861 is an equidigital number, since it uses as much as digits as its factorization.

94139861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 94139861 is about 9702.5698142296. The cubic root of 94139861 is about 454.9089879551.

The spelling of 94139861 in words is "ninety-four million, one hundred thirty-nine thousand, eight hundred sixty-one".