986999401 has 2 divisors, whose sum is σ = 986999402. Its totient is φ = 986999400.

The previous prime is 986999381. The next prime is 986999449. The reversal of 986999401 is 104999689.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 894069801 + 92929600 = 29901^2 + 9640^2 .

It is a cyclic number.

It is not a de Polignac number, because 986999401 - 2¹¹ = 986997353 is a prime.

It is not a weakly prime, because it can be changed into another prime (986999701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493499700 + 493499701.

It is an arithmetic number, because the mean of its divisors is an integer number (493499701).

Almost surely, 2^986999401 is an apocalyptic number.

It is an amenable number.

986999401 is a deficient number, since it is larger than the sum of its proper divisors (1).

986999401 is an equidigital number, since it uses as much as digits as its factorization.

986999401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 55.

The square root of 986999401 is about 31416.5466116185. The cubic root of 986999401 is about 995.6475506688.

The spelling of 986999401 in words is "nine hundred eighty-six million, nine hundred ninety-nine thousand, four hundred one".