78734953 has 16 divisors (see below), whose sum is σ = 88359552. Its totient is φ = 69552000.

The previous prime is 78734933. The next prime is 78734959. The reversal of 78734953 is 35943787.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 78734953 - 2⁵ = 78734921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78734959) 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 15 ways as a sum of consecutive naturals, for example, 56323 + ... + 57703.

It is an arithmetic number, because the mean of its divisors is an integer number (5522472).

Almost surely, 2^78734953 is an apocalyptic number.

78734953 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

78734953 is a deficient number, since it is larger than the sum of its proper divisors (9624599).

78734953 is a wasteful number, since it uses less digits than its factorization.

78734953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536.

The product of its digits is 635040, while the sum is 46.

The square root of 78734953 is about 8873.2718317428. The cubic root of 78734953 is about 428.6036424410.

The spelling of 78734953 in words is "seventy-eight million, seven hundred thirty-four thousand, nine hundred fifty-three".