1009978 has 4 divisors (see below), whose sum is σ = 1514970. Its totient is φ = 504988.

The previous prime is 1009963. The next prime is 1009991. The reversal of 1009978 is 8799001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1006009 + 3969 = 1003^2 + 63^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252493 + ... + 252496.

2^1009978 is an apocalyptic number.

1009978 is a deficient number, since it is larger than the sum of its proper divisors (504992).

1009978 is an equidigital number, since it uses as much as digits as its factorization.

1009978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504991.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 1009978 is about 1004.9766166434. The cubic root of 1009978 is about 100.3314998641.

The spelling of 1009978 in words is "one million, nine thousand, nine hundred seventy-eight".