545977517 has 4 divisors (see below), whose sum is σ = 546157920. Its totient is φ = 545797116.

The previous prime is 545977501. The next prime is 545977529. The reversal of 545977517 is 715779545.

It is a happy number.

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 545977517 - 2⁴ = 545977501 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 (545977567) 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, 85583 + ... + 91740.

It is an arithmetic number, because the mean of its divisors is an integer number (136539480).

Almost surely, 2^545977517 is an apocalyptic number.

It is an amenable number.

545977517 is a deficient number, since it is larger than the sum of its proper divisors (180403).

545977517 is a wasteful number, since it uses less digits than its factorization.

545977517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180402.

The product of its digits is 1543500, while the sum is 50.

The square root of 545977517 is about 23366.1617943555. The cubic root of 545977517 is about 817.3189838218.

The spelling of 545977517 in words is "five hundred forty-five million, nine hundred seventy-seven thousand, five hundred seventeen".