899640337 has 2 divisors, whose sum is σ = 899640338. Its totient is φ = 899640336.

The previous prime is 899640293. The next prime is 899640341. The reversal of 899640337 is 733046998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 695693376 + 203946961 = 26376^2 + 14281^2 .

It is a cyclic number.

It is not a de Polignac number, because 899640337 - 2²³ = 891251729 is a prime.

It is not a weakly prime, because it can be changed into another prime (899643337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449820168 + 449820169.

It is an arithmetic number, because the mean of its divisors is an integer number (449820169).

Almost surely, 2^899640337 is an apocalyptic number.

It is an amenable number.

899640337 is a deficient number, since it is larger than the sum of its proper divisors (1).

899640337 is an equidigital number, since it uses as much as digits as its factorization.

899640337 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 49.

The square root of 899640337 is about 29994.0050176698. The cubic root of 899640337 is about 965.3607560591.

The spelling of 899640337 in words is "eight hundred ninety-nine million, six hundred forty thousand, three hundred thirty-seven".