83720963 has 2 divisors, whose sum is σ = 83720964. Its totient is φ = 83720962.

The previous prime is 83720947. The next prime is 83720977. The reversal of 83720963 is 36902738.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83720963 - 2⁴ = 83720947 is a prime.

It is not a weakly prime, because it can be changed into another prime (83720933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41860481 + 41860482.

It is an arithmetic number, because the mean of its divisors is an integer number (41860482).

Almost surely, 2^83720963 is an apocalyptic number.

83720963 is a deficient number, since it is larger than the sum of its proper divisors (1).

83720963 is an equidigital number, since it uses as much as digits as its factorization.

83720963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 83720963 is about 9149.9160105435. The cubic root of 83720963 is about 437.4664363912.

The spelling of 83720963 in words is "eighty-three million, seven hundred twenty thousand, nine hundred sixty-three".