69146989 has 2 divisors, whose sum is σ = 69146990. Its totient is φ = 69146988.

The previous prime is 69146983. The next prime is 69146999. The reversal of 69146989 is 98964196.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64673764 + 4473225 = 8042^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 69146989 - 2³ = 69146981 is a prime.

It is a super-2 number, since 2×69146989² = 9562612175532242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69146981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34573494 + 34573495.

It is an arithmetic number, because the mean of its divisors is an integer number (34573495).

Almost surely, 2^69146989 is an apocalyptic number.

It is an amenable number.

69146989 is a deficient number, since it is larger than the sum of its proper divisors (1).

69146989 is an equidigital number, since it uses as much as digits as its factorization.

69146989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 52.

The square root of 69146989 is about 8315.4668540016. The cubic root of 69146989 is about 410.4476352295.

The spelling of 69146989 in words is "sixty-nine million, one hundred forty-six thousand, nine hundred eighty-nine".