84259969 has 2 divisors, whose sum is σ = 84259970. Its totient is φ = 84259968.

The previous prime is 84259951. The next prime is 84259979. The reversal of 84259969 is 96995248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54937744 + 29322225 = 7412^2 + 5415^2 .

It is a cyclic number.

It is not a de Polignac number, because 84259969 - 2¹⁷ = 84128897 is a prime.

It is a super-2 number, since 2×84259969² = 14199484751761922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84259979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42129984 + 42129985.

It is an arithmetic number, because the mean of its divisors is an integer number (42129985).

Almost surely, 2^84259969 is an apocalyptic number.

It is an amenable number.

84259969 is a deficient number, since it is larger than the sum of its proper divisors (1).

84259969 is an equidigital number, since it uses as much as digits as its factorization.

84259969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 52.

The square root of 84259969 is about 9179.3229053128. The cubic root of 84259969 is about 438.4032499742.

The spelling of 84259969 in words is "eighty-four million, two hundred fifty-nine thousand, nine hundred sixty-nine".