83857901 has 2 divisors, whose sum is σ = 83857902. Its totient is φ = 83857900.

The previous prime is 83857877. The next prime is 83857927. The reversal of 83857901 is 10975838.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76562500 + 7295401 = 8750^2 + 2701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83857901 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83857601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41928950 + 41928951.

It is an arithmetic number, because the mean of its divisors is an integer number (41928951).

Almost surely, 2^83857901 is an apocalyptic number.

It is an amenable number.

83857901 is a deficient number, since it is larger than the sum of its proper divisors (1).

83857901 is an equidigital number, since it uses as much as digits as its factorization.

83857901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 83857901 is about 9157.3959726551. The cubic root of 83857901 is about 437.7048201236.

The spelling of 83857901 in words is "eighty-three million, eight hundred fifty-seven thousand, nine hundred one".