9978429 has 8 divisors (see below), whose sum is σ = 13587840. Its totient is φ = 6510656.

The previous prime is 9978427. The next prime is 9978431. The reversal of 9978429 is 9248799.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9978427) and next prime (9978431).

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 9978429 - 2¹ = 9978427 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978427) 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, 35244 + ... + 35525.

It is an arithmetic number, because the mean of its divisors is an integer number (1698480).

Almost surely, 2^9978429 is an apocalyptic number.

It is an amenable number.

9978429 is a deficient number, since it is larger than the sum of its proper divisors (3609411).

9978429 is a wasteful number, since it uses less digits than its factorization.

9978429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70819.

The product of its digits is 326592, while the sum is 48.

The square root of 9978429 is about 3158.8651443200. The cubic root of 9978429 is about 215.2884464477.

The spelling of 9978429 in words is "nine million, nine hundred seventy-eight thousand, four hundred twenty-nine".