77989453 has 4 divisors (see below), whose sum is σ = 79087968. Its totient is φ = 76890940.

The previous prime is 77989441. The next prime is 77989463. The reversal of 77989453 is 35498977.

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 77989453 - 2⁹ = 77988941 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 77989453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77989463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549151 + ... + 549292.

It is an arithmetic number, because the mean of its divisors is an integer number (19771992).

Almost surely, 2^77989453 is an apocalyptic number.

It is an amenable number.

77989453 is a deficient number, since it is larger than the sum of its proper divisors (1098515).

77989453 is a wasteful number, since it uses less digits than its factorization.

77989453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098514.

The product of its digits is 1905120, while the sum is 52.

The square root of 77989453 is about 8831.1637398477. The cubic root of 77989453 is about 427.2466092970.

The spelling of 77989453 in words is "seventy-seven million, nine hundred eighty-nine thousand, four hundred fifty-three".