78953489 has 4 divisors (see below), whose sum is σ = 78988800. Its totient is φ = 78918180.

The previous prime is 78953477. The next prime is 78953509. The reversal of 78953489 is 98435987.

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 78953489 - 2⁴ = 78953473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78953489.

It is not an unprimeable number, because it can be changed into a prime (78953419) 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, 14057 + ... + 18854.

It is an arithmetic number, because the mean of its divisors is an integer number (19747200).

Almost surely, 2^78953489 is an apocalyptic number.

It is an amenable number.

78953489 is a deficient number, since it is larger than the sum of its proper divisors (35311).

78953489 is a wasteful number, since it uses less digits than its factorization.

78953489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35310.

The product of its digits is 2177280, while the sum is 53.

The square root of 78953489 is about 8885.5775839278. The cubic root of 78953489 is about 428.9998188809. Note that the first 3 decimals are identical.

The spelling of 78953489 in words is "seventy-eight million, nine hundred fifty-three thousand, four hundred eighty-nine".