1173400947 has 12 divisors (see below), whose sum is σ = 1695854160. Its totient is φ = 781832688.

The previous prime is 1173400939. The next prime is 1173400957. The reversal of 1173400947 is 7490043711.

It is not a de Polignac number, because 1173400947 - 2³ = 1173400939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1173400957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18672 + ... + 51917.

It is an arithmetic number, because the mean of its divisors is an integer number (141321180).

Almost surely, 2^1173400947 is an apocalyptic number.

1173400947 is a deficient number, since it is larger than the sum of its proper divisors (522453213).

1173400947 is a wasteful number, since it uses less digits than its factorization.

1173400947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72442 (or 72439 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 1173400947 is about 34254.9404757912. The cubic root of 1173400947 is about 1054.7482450728.

The spelling of 1173400947 in words is "one billion, one hundred seventy-three million, four hundred thousand, nine hundred forty-seven".