659497421 has 8 divisors (see below), whose sum is σ = 719716800. Its totient is φ = 599322240.

The previous prime is 659497417. The next prime is 659497427. The reversal of 659497421 is 124794956.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 659497421 - 2² = 659497417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659497427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25400 + ... + 44318.

It is an arithmetic number, because the mean of its divisors is an integer number (89964600).

Almost surely, 2^659497421 is an apocalyptic number.

It is an amenable number.

659497421 is a deficient number, since it is larger than the sum of its proper divisors (60219379).

659497421 is a wasteful number, since it uses less digits than its factorization.

659497421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22099.

The product of its digits is 544320, while the sum is 47.

The square root of 659497421 is about 25680.6818640004. The cubic root of 659497421 is about 870.4377156178.

The spelling of 659497421 in words is "six hundred fifty-nine million, four hundred ninety-seven thousand, four hundred twenty-one".