976649 has 4 divisors (see below), whose sum is σ = 1019136. Its totient is φ = 934164.

The previous prime is 976643. The next prime is 976669. The reversal of 976649 is 946679.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-976649 is a prime.

It is a d-powerful number, because it can be written as 9³ + 7⁷ + 6⁶ + 6⁶ + 4² + 9⁵ .

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (976643) 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 in 3 ways as a sum of consecutive naturals, for example, 21209 + ... + 21254.

It is an arithmetic number, because the mean of its divisors is an integer number (254784).

2⁹⁷⁶⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

976649 is a deficient number, since it is larger than the sum of its proper divisors (42487).

976649 is a wasteful number, since it uses less digits than its factorization.

976649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42486.

The product of its digits is 81648, while the sum is 41.

The square root of 976649 is about 988.2555337563. The cubic root of 976649 is about 99.2154949456.

The spelling of 976649 in words is "nine hundred seventy-six thousand, six hundred forty-nine".