989894069 has 2 divisors, whose sum is σ = 989894070. Its totient is φ = 989894068.

The previous prime is 989894057. The next prime is 989894083. The reversal of 989894069 is 960498989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 588693169 + 401200900 = 24263^2 + 20030^2 .

It is a cyclic number.

It is not a de Polignac number, because 989894069 - 2⁸ = 989893813 is a prime.

It is a super-2 number, since 2×989894069² = 1959780535682753522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989894039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494947034 + 494947035.

It is an arithmetic number, because the mean of its divisors is an integer number (494947035).

Almost surely, 2^989894069 is an apocalyptic number.

It is an amenable number.

989894069 is a deficient number, since it is larger than the sum of its proper divisors (1).

989894069 is an equidigital number, since it uses as much as digits as its factorization.

989894069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10077696, while the sum is 62.

The square root of 989894069 is about 31462.5820459796. The cubic root of 989894069 is about 996.6199444298.

The spelling of 989894069 in words is "nine hundred eighty-nine million, eight hundred ninety-four thousand, sixty-nine".