1009969578 has 12 divisors (see below), whose sum is σ = 2188267458. Its totient is φ = 336656520.

The previous prime is 1009969451. The next prime is 1009969607. The reversal of 1009969578 is 8759699001.

1009969578 is a `hidden beast` number, since 1 + 0 + 0 + 9 + 9 + 69 + 578 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1007237169 + 2732409 = 31737^2 + 1653^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28054693 + ... + 28054728.

Almost surely, 2^1009969578 is an apocalyptic number.

1009969578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1009969578 is an abundant number, since it is smaller than the sum of its proper divisors (1178297880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1009969578 is a wasteful number, since it uses less digits than its factorization.

1009969578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56109429 (or 56109426 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The square root of 1009969578 is about 31780.0185336636. The cubic root of 1009969578 is about 1003.3122098203.

The spelling of 1009969578 in words is "one billion, nine million, nine hundred sixty-nine thousand, five hundred seventy-eight".