77620573 has 4 divisors (see below), whose sum is σ = 77696320. Its totient is φ = 77544828.

The previous prime is 77620531. The next prime is 77620579. The reversal of 77620573 is 37502677.

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 77620573 - 2⁹ = 77620061 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 (77620579) 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, 36315 + ... + 38392.

It is an arithmetic number, because the mean of its divisors is an integer number (19424080).

Almost surely, 2^77620573 is an apocalyptic number.

It is an amenable number.

77620573 is a deficient number, since it is larger than the sum of its proper divisors (75747).

77620573 is a wasteful number, since it uses less digits than its factorization.

77620573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75746.

The product of its (nonzero) digits is 61740, while the sum is 37.

The square root of 77620573 is about 8810.2538555935. The cubic root of 77620573 is about 426.5719374522.

The spelling of 77620573 in words is "seventy-seven million, six hundred twenty thousand, five hundred seventy-three".