978513409 has 8 divisors (see below), whose sum is σ = 994351680. Its totient is φ = 962732400.

The previous prime is 978513391. The next prime is 978513427. The reversal of 978513409 is 904315879.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (978513391) and next prime (978513427).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 978513409 - 2⁵ = 978513377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978513439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20827 + ... + 48895.

It is an arithmetic number, because the mean of its divisors is an integer number (124293960).

Almost surely, 2^978513409 is an apocalyptic number.

It is an amenable number.

978513409 is a deficient number, since it is larger than the sum of its proper divisors (15838271).

978513409 is a wasteful number, since it uses less digits than its factorization.

978513409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28631.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 978513409 is about 31281.1989699883. The cubic root of 978513409 is about 992.7858846895.

The spelling of 978513409 in words is "nine hundred seventy-eight million, five hundred thirteen thousand, four hundred nine".