78053453 has 4 divisors (see below), whose sum is σ = 78085980. Its totient is φ = 78020928.

The previous prime is 78053431. The next prime is 78053489. The reversal of 78053453 is 35435087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35435087 = 643 ⋅55109.

It can be written as a sum of positive squares in 2 ways, for example, as 56505289 + 21548164 = 7517^2 + 4642^2 .

It is a cyclic number.

It is not a de Polignac number, because 78053453 - 2⁶ = 78053389 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 (78056453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12350 + ... + 17567.

It is an arithmetic number, because the mean of its divisors is an integer number (19521495).

Almost surely, 2^78053453 is an apocalyptic number.

It is an amenable number.

78053453 is a deficient number, since it is larger than the sum of its proper divisors (32527).

78053453 is a wasteful number, since it uses less digits than its factorization.

78053453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32526.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 78053453 is about 8834.7865282643. The cubic root of 78053453 is about 427.3634469192.

The spelling of 78053453 in words is "seventy-eight million, fifty-three thousand, four hundred fifty-three".