77419889 has 4 divisors (see below), whose sum is σ = 81494640. Its totient is φ = 73345140.

The previous prime is 77419883. The next prime is 77419897. The reversal of 77419889 is 98891477.

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: 98891477 = 5501 ⋅17977.

It is a cyclic number.

It is not a de Polignac number, because 77419889 - 2¹⁶ = 77354353 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 77419889.

It is not an unprimeable number, because it can be changed into a prime (77419883) 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, 2037347 + ... + 2037384.

It is an arithmetic number, because the mean of its divisors is an integer number (20373660).

Almost surely, 2^77419889 is an apocalyptic number.

It is an amenable number.

77419889 is a deficient number, since it is larger than the sum of its proper divisors (4074751).

77419889 is a wasteful number, since it uses less digits than its factorization.

77419889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074750.

The product of its digits is 1016064, while the sum is 53.

The square root of 77419889 is about 8798.8572553486. The cubic root of 77419889 is about 426.2039935669.

The spelling of 77419889 in words is "seventy-seven million, four hundred nineteen thousand, eight hundred eighty-nine".