77420573 has 4 divisors (see below), whose sum is σ = 81495360. Its totient is φ = 73345788.

The previous prime is 77420561. The next prime is 77420579. The reversal of 77420573 is 37502477.

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 77420573 - 2⁶ = 77420509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77420579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2037365 + ... + 2037402.

It is an arithmetic number, because the mean of its divisors is an integer number (20373840).

Almost surely, 2^77420573 is an apocalyptic number.

It is an amenable number.

77420573 is a deficient number, since it is larger than the sum of its proper divisors (4074787).

77420573 is a wasteful number, since it uses less digits than its factorization.

77420573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074786.

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 77420573 is about 8798.8961239465. The cubic root of 77420573 is about 426.2052487253.

The spelling of 77420573 in words is "seventy-seven million, four hundred twenty thousand, five hundred seventy-three".