1171382978 has 4 divisors (see below), whose sum is σ = 1757074470. Its totient is φ = 585691488.

The previous prime is 1171382959. The next prime is 1171382983. The reversal of 1171382978 is 8792831711.

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., 696273769 + 475109209 = 26387^2 + 21797^2 .

It is a super-2 number, since 2×1171382978² = 2744276162296296968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 292845743 + ... + 292845746.

Almost surely, 2^1171382978 is an apocalyptic number.

1171382978 is a deficient number, since it is larger than the sum of its proper divisors (585691492).

1171382978 is an equidigital number, since it uses as much as digits as its factorization.

1171382978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585691491.

The product of its digits is 169344, while the sum is 47.

The square root of 1171382978 is about 34225.4726483068. The cubic root of 1171382978 is about 1054.1432598871.

The spelling of 1171382978 in words is "one billion, one hundred seventy-one million, three hundred eighty-two thousand, nine hundred seventy-eight".