830664421 has 16 divisors (see below), whose sum is σ = 888894000. Its totient is φ = 773521408.

The previous prime is 830664413. The next prime is 830664431. The reversal of 830664421 is 124466038.

It can be written as a sum of positive squares in 8 ways, for example, as 151019521 + 679644900 = 12289^2 + 26070^2 .

It is a cyclic number.

It is not a de Polignac number, because 830664421 - 2³ = 830664413 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 (830664431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 893685 + ... + 894613.

It is an arithmetic number, because the mean of its divisors is an integer number (55555875).

Almost surely, 2^830664421 is an apocalyptic number.

It is an amenable number.

830664421 is a deficient number, since it is larger than the sum of its proper divisors (58229579).

830664421 is a wasteful number, since it uses less digits than its factorization.

830664421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 830664421 is about 28821.2494697922. The cubic root of 830664421 is about 940.0303374093.

It can be divided in two parts, 8306 and 64421, that added together give a palindrome (72727).

The spelling of 830664421 in words is "eight hundred thirty million, six hundred sixty-four thousand, four hundred twenty-one".