73978974 has 16 divisors (see below), whose sum is σ = 164397840. Its totient is φ = 24659640.

The previous prime is 73978973. The next prime is 73978981. The reversal of 73978974 is 47987937.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1369981 = 73978974 / (7 + 3 + 9 + 7 + 8 + 9 + 7 + 4).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73978974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73978973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684937 + ... + 685044.

It is an arithmetic number, because the mean of its divisors is an integer number (10274865).

Almost surely, 2^73978974 is an apocalyptic number.

73978974 is an abundant number, since it is smaller than the sum of its proper divisors (90418866).

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

73978974 is a wasteful number, since it uses less digits than its factorization.

73978974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369992 (or 1369986 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 73978974 is about 8601.1030687930. The cubic root of 73978974 is about 419.7938784510.

The spelling of 73978974 in words is "seventy-three million, nine hundred seventy-eight thousand, nine hundred seventy-four".