978429 has 4 divisors (see below), whose sum is σ = 1304576. Its totient is φ = 652284.

The previous prime is 978427. The next prime is 978449. The reversal of 978429 is 924879.

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: 924879 = 3 ⋅308293.

It is not a de Polignac number, because 978429 - 2¹ = 978427 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978429.

It is not an unprimeable number, because it can be changed into a prime (978427) 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, 163069 + ... + 163074.

It is an arithmetic number, because the mean of its divisors is an integer number (326144).

2⁹⁷⁸⁴²⁹ is an apocalyptic number.

It is an amenable number.

978429 is a deficient number, since it is larger than the sum of its proper divisors (326147).

978429 is a wasteful number, since it uses less digits than its factorization.

978429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326146.

The product of its digits is 36288, while the sum is 39.

The square root of 978429 is about 989.1557005851. The cubic root of 978429 is about 99.2757337142.

The spelling of 978429 in words is "nine hundred seventy-eight thousand, four hundred twenty-nine".