612477521 has 4 divisors (see below), whose sum is σ = 644713200. Its totient is φ = 580241844.

The previous prime is 612477457. The next prime is 612477527. The reversal of 612477521 is 125774216.

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 612477521 - 2⁶ = 612477457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612477527) 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, 16117811 + ... + 16117848.

It is an arithmetic number, because the mean of its divisors is an integer number (161178300).

Almost surely, 2^612477521 is an apocalyptic number.

It is an amenable number.

612477521 is a deficient number, since it is larger than the sum of its proper divisors (32235679).

612477521 is a wasteful number, since it uses less digits than its factorization.

612477521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32235678.

The product of its digits is 23520, while the sum is 35.

The square root of 612477521 is about 24748.2831929813. The cubic root of 612477521 is about 849.2392367245.

The spelling of 612477521 in words is "six hundred twelve million, four hundred seventy-seven thousand, five hundred twenty-one".