89827979 has 2 divisors, whose sum is σ = 89827980. Its totient is φ = 89827978.

The previous prime is 89827963. The next prime is 89828009. The reversal of 89827979 is 97972898.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89827979 - 2⁴ = 89827963 is a prime.

It is a super-2 number, since 2×89827979² = 16138131622448882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89827909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44913989 + 44913990.

It is an arithmetic number, because the mean of its divisors is an integer number (44913990).

Almost surely, 2^89827979 is an apocalyptic number.

89827979 is a deficient number, since it is larger than the sum of its proper divisors (1).

89827979 is an equidigital number, since it uses as much as digits as its factorization.

89827979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 59.

The square root of 89827979 is about 9477.7623413968. The cubic root of 89827979 is about 447.8547756197.

It can be divided in two parts, 8982 and 7979, that added together give a palindrome (16961).

The spelling of 89827979 in words is "eighty-nine million, eight hundred twenty-seven thousand, nine hundred seventy-nine".