78720453 has 12 divisors (see below), whose sum is σ = 129951328. Its totient is φ = 44983080.

The previous prime is 78720431. The next prime is 78720457. The reversal of 78720453 is 35402787.

It is not a de Polignac number, because 78720453 - 2¹⁰ = 78719429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78720457) 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 11 ways as a sum of consecutive naturals, for example, 624703 + ... + 624828.

Almost surely, 2^78720453 is an apocalyptic number.

It is an amenable number.

78720453 is a deficient number, since it is larger than the sum of its proper divisors (51230875).

78720453 is a wasteful number, since it uses less digits than its factorization.

78720453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249544 (or 1249541 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 78720453 is about 8872.4547336123. The cubic root of 78720453 is about 428.5773299664.

The spelling of 78720453 in words is "seventy-eight million, seven hundred twenty thousand, four hundred fifty-three".