976409 has 4 divisors (see below), whose sum is σ = 1115904. Its totient is φ = 836916.

The previous prime is 976403. The next prime is 976411. The reversal of 976409 is 904679.

It is a happy number.

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 not a de Polignac number, because 976409 - 2¹² = 972313 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (976403) 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, 69737 + ... + 69750.

It is an arithmetic number, because the mean of its divisors is an integer number (278976).

2⁹⁷⁶⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

976409 is a deficient number, since it is larger than the sum of its proper divisors (139495).

976409 is a wasteful number, since it uses less digits than its factorization.

976409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139494.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 976409 is about 988.1341002111. The cubic root of 976409 is about 99.2073672663.

The spelling of 976409 in words is "nine hundred seventy-six thousand, four hundred nine".