83243957 has 2 divisors, whose sum is σ = 83243958. Its totient is φ = 83243956.

The previous prime is 83243947. The next prime is 83243977. The reversal of 83243957 is 75934238.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81884401 + 1359556 = 9049^2 + 1166^2 .

It is a cyclic number.

It is not a de Polignac number, because 83243957 - 2⁸ = 83243701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83243947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41621978 + 41621979.

It is an arithmetic number, because the mean of its divisors is an integer number (41621979).

Almost surely, 2^83243957 is an apocalyptic number.

It is an amenable number.

83243957 is a deficient number, since it is larger than the sum of its proper divisors (1).

83243957 is an equidigital number, since it uses as much as digits as its factorization.

83243957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 83243957 is about 9123.8126350775. The cubic root of 83243957 is about 436.6340216711.

The spelling of 83243957 in words is "eighty-three million, two hundred forty-three thousand, nine hundred fifty-seven".