1146737978 has 4 divisors (see below), whose sum is σ = 1720106970. Its totient is φ = 573368988.

The previous prime is 1146737971. The next prime is 1146737987. The reversal of 1146737978 is 8797376411.

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., 1120040089 + 26697889 = 33467^2 + 5167^2 .

It is not an unprimeable number, because it can be changed into a prime (1146737971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286684493 + ... + 286684496.

Almost surely, 2^1146737978 is an apocalyptic number.

1146737978 is a deficient number, since it is larger than the sum of its proper divisors (573368992).

1146737978 is an equidigital number, since it uses as much as digits as its factorization.

1146737978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573368991.

The product of its digits is 1778112, while the sum is 53.

The square root of 1146737978 is about 33863.5198702084. The cubic root of 1146737978 is about 1046.6980103172.

The spelling of 1146737978 in words is "one billion, one hundred forty-six million, seven hundred thirty-seven thousand, nine hundred seventy-eight".