78106453 has 4 divisors (see below), whose sum is σ = 80626048. Its totient is φ = 75586860.

The previous prime is 78106451. The next prime is 78106477. The reversal of 78106453 is 35460187.

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.

It is a cyclic number.

It is not a de Polignac number, because 78106453 - 2¹ = 78106451 is a prime.

It is a super-2 number, since 2×78106453² = 12201236000482418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78106451) 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, 1259751 + ... + 1259812.

It is an arithmetic number, because the mean of its divisors is an integer number (20156512).

Almost surely, 2^78106453 is an apocalyptic number.

It is an amenable number.

78106453 is a deficient number, since it is larger than the sum of its proper divisors (2519595).

78106453 is a wasteful number, since it uses less digits than its factorization.

78106453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519594.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 78106453 is about 8837.7855257977. The cubic root of 78106453 is about 427.4601547396.

The spelling of 78106453 in words is "seventy-eight million, one hundred six thousand, four hundred fifty-three".