989870597 has 2 divisors, whose sum is σ = 989870598. Its totient is φ = 989870596.

The previous prime is 989870593. The next prime is 989870647. The reversal of 989870597 is 795078989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 512841316 + 477029281 = 22646^2 + 21841^2 .

It is a cyclic number.

It is not a de Polignac number, because 989870597 - 2² = 989870593 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989870593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494935298 + 494935299.

It is an arithmetic number, because the mean of its divisors is an integer number (494935299).

Almost surely, 2^989870597 is an apocalyptic number.

It is an amenable number.

989870597 is a deficient number, since it is larger than the sum of its proper divisors (1).

989870597 is an equidigital number, since it uses as much as digits as its factorization.

989870597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11430720, while the sum is 62.

The square root of 989870597 is about 31462.2090292465. The cubic root of 989870597 is about 996.6120672071.

The spelling of 989870597 in words is "nine hundred eighty-nine million, eight hundred seventy thousand, five hundred ninety-seven".