899220769 has 2 divisors, whose sum is σ = 899220770. Its totient is φ = 899220768.

The previous prime is 899220761. The next prime is 899220793. The reversal of 899220769 is 967022998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480486400 + 418734369 = 21920^2 + 20463^2 .

It is a cyclic number.

It is not a de Polignac number, because 899220769 - 2³ = 899220761 is a prime.

It is a super-2 number, since 2×899220769² = 1617195982801902722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (899220761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449610384 + 449610385.

It is an arithmetic number, because the mean of its divisors is an integer number (449610385).

Almost surely, 2^899220769 is an apocalyptic number.

It is an amenable number.

899220769 is a deficient number, since it is larger than the sum of its proper divisors (1).

899220769 is an equidigital number, since it uses as much as digits as its factorization.

899220769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 899220769 is about 29987.0100043335. The cubic root of 899220769 is about 965.2106599792.

The spelling of 899220769 in words is "eight hundred ninety-nine million, two hundred twenty thousand, seven hundred sixty-nine".