69985969 has 2 divisors, whose sum is σ = 69985970. Its totient is φ = 69985968.

The previous prime is 69985963. The next prime is 69986009. The reversal of 69985969 is 96958996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60652944 + 9333025 = 7788^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 69985969 - 2⁹ = 69985457 is a prime.

It is a super-2 number, since 2×69985969² = 9796071713737922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (69985963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34992984 + 34992985.

It is an arithmetic number, because the mean of its divisors is an integer number (34992985).

Almost surely, 2^69985969 is an apocalyptic number.

It is an amenable number.

69985969 is a deficient number, since it is larger than the sum of its proper divisors (1).

69985969 is an equidigital number, since it uses as much as digits as its factorization.

69985969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9447840, while the sum is 61.

The square root of 69985969 is about 8365.7617106872. The cubic root of 69985969 is about 412.1009920675.

It can be divided in two parts, 699 and 85969, that added together give a palindrome (86668).

The spelling of 69985969 in words is "sixty-nine million, nine hundred eighty-five thousand, nine hundred sixty-nine".