986649646 has 4 divisors (see below), whose sum is σ = 1479974472. Its totient is φ = 493324822.

The previous prime is 986649637. The next prime is 986649647. The reversal of 986649646 is 646946689.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646946689 = 23279 ⋅27791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986649647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246662410 + ... + 246662413.

It is an arithmetic number, because the mean of its divisors is an integer number (369993618).

Almost surely, 2^986649646 is an apocalyptic number.

986649646 is a deficient number, since it is larger than the sum of its proper divisors (493324826).

986649646 is a wasteful number, since it uses less digits than its factorization.

986649646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493324825.

The product of its digits is 13436928, while the sum is 58.

The square root of 986649646 is about 31410.9797045555. The cubic root of 986649646 is about 995.5299302494.

The spelling of 986649646 in words is "nine hundred eighty-six million, six hundred forty-nine thousand, six hundred forty-six".