1146877978 has 4 divisors (see below), whose sum is σ = 1720316970. Its totient is φ = 573438988.

The previous prime is 1146877939. The next prime is 1146878009. The reversal of 1146877978 is 8797786411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8797786411 = 223 ⋅39451957.

It can be written as a sum of positive squares in only one way, i.e., 630361449 + 516516529 = 25107^2 + 22727^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286719493 + ... + 286719496.

Almost surely, 2^1146877978 is an apocalyptic number.

1146877978 is a deficient number, since it is larger than the sum of its proper divisors (573438992).

1146877978 is an equidigital number, since it uses as much as digits as its factorization.

1146877978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573438991.

The product of its digits is 4741632, while the sum is 58.

The square root of 1146877978 is about 33865.5869283259. The cubic root of 1146877978 is about 1046.7406041097.

The spelling of 1146877978 in words is "one billion, one hundred forty-six million, eight hundred seventy-seven thousand, nine hundred seventy-eight".