78453073 has 4 divisors (see below), whose sum is σ = 78575728. Its totient is φ = 78330420.

The previous prime is 78453019. The next prime is 78453103. The reversal of 78453073 is 37035487.

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: 37035487 = 557 ⋅66491.

It is a cyclic number.

It is not a de Polignac number, because 78453073 - 2²¹ = 76355921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78457073) 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, 60363 + ... + 61648.

It is an arithmetic number, because the mean of its divisors is an integer number (19643932).

Almost surely, 2^78453073 is an apocalyptic number.

It is an amenable number.

78453073 is a deficient number, since it is larger than the sum of its proper divisors (122655).

78453073 is a wasteful number, since it uses less digits than its factorization.

78453073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122654.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 78453073 is about 8857.3739336216. The cubic root of 78453073 is about 428.0915477299.

The spelling of 78453073 in words is "seventy-eight million, four hundred fifty-three thousand, seventy-three".