78769453 has 4 divisors (see below), whose sum is σ = 90022240. Its totient is φ = 67516668.

The previous prime is 78769451. The next prime is 78769463. The reversal of 78769453 is 35496787.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35496787 = 103 ⋅344629.

It is a cyclic number.

It is not a de Polignac number, because 78769453 - 2¹ = 78769451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78769397 and 78769406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78769451) 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, 5626383 + ... + 5626396.

It is an arithmetic number, because the mean of its divisors is an integer number (22505560).

Almost surely, 2^78769453 is an apocalyptic number.

It is an amenable number.

78769453 is a deficient number, since it is larger than the sum of its proper divisors (11252787).

78769453 is a wasteful number, since it uses less digits than its factorization.

78769453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11252786.

The product of its digits is 1270080, while the sum is 49.

The square root of 78769453 is about 8875.2156593516. The cubic root of 78769453 is about 428.6662349994. Note that the first 3 decimals are identical.

The spelling of 78769453 in words is "seventy-eight million, seven hundred sixty-nine thousand, four hundred fifty-three".