899749 has 2 divisors, whose sum is σ = 899750. Its totient is φ = 899748.

The previous prime is 899719. The next prime is 899753. The reversal of 899749 is 947998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 893025 + 6724 = 945^2 + 82^2 .

It is a cyclic number.

It is not a de Polignac number, because 899749 - 2⁹ = 899237 is a prime.

899749 is a lucky number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 899699 and 899708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (899719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449874 + 449875.

It is an arithmetic number, because the mean of its divisors is an integer number (449875).

2⁸⁹⁹⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

899749 is a deficient number, since it is larger than the sum of its proper divisors (1).

899749 is an equidigital number, since it uses as much as digits as its factorization.

899749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 46.

The square root of 899749 is about 948.5510002103. The cubic root of 899749 is about 96.5399621507.

The spelling of 899749 in words is "eight hundred ninety-nine thousand, seven hundred forty-nine".