982551649 has 4 divisors (see below), whose sum is σ = 984505536. Its totient is φ = 980597764.

The previous prime is 982551643. The next prime is 982551653. The reversal of 982551649 is 946155289.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 946155289 = 317 ⋅2984717.

It is a cyclic number.

It is not a de Polignac number, because 982551649 - 2⁹ = 982551137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (982551643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976189 + ... + 977194.

It is an arithmetic number, because the mean of its divisors is an integer number (246126384).

Almost surely, 2^982551649 is an apocalyptic number.

It is an amenable number.

982551649 is a deficient number, since it is larger than the sum of its proper divisors (1953887).

982551649 is a wasteful number, since it uses less digits than its factorization.

982551649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953886.

The product of its digits is 777600, while the sum is 49.

The square root of 982551649 is about 31345.6799096781. The cubic root of 982551649 is about 994.1497240142.

The spelling of 982551649 in words is "nine hundred eighty-two million, five hundred fifty-one thousand, six hundred forty-nine".