73978955 has 8 divisors (see below), whose sum is σ = 89014992. Its totient is φ = 59023008.

The previous prime is 73978939. The next prime is 73978967. The reversal of 73978955 is 55987937.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73978955 - 2⁴ = 73978939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73978897 and 73978906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17969 + ... + 21698.

It is an arithmetic number, because the mean of its divisors is an integer number (11126874).

Almost surely, 2^73978955 is an apocalyptic number.

73978955 is a deficient number, since it is larger than the sum of its proper divisors (15036037).

73978955 is a wasteful number, since it uses less digits than its factorization.

73978955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40045.

The product of its digits is 2381400, while the sum is 53.

The square root of 73978955 is about 8601.1019642834. The cubic root of 73978955 is about 419.7938425125.

The spelling of 73978955 in words is "seventy-three million, nine hundred seventy-eight thousand, nine hundred fifty-five".