6420698 has 4 divisors (see below), whose sum is σ = 9631050. Its totient is φ = 3210348.

The previous prime is 6420697. The next prime is 6420707. The reversal of 6420698 is 8960246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6385729 + 34969 = 2527^2 + 187^2 .

It is not an unprimeable number, because it can be changed into a prime (6420697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1605173 + ... + 1605176.

Almost surely, 2^6420698 is an apocalyptic number.

6420698 is a deficient number, since it is larger than the sum of its proper divisors (3210352).

6420698 is a wasteful number, since it uses less digits than its factorization.

6420698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210351.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 6420698 is about 2533.9096274335. The cubic root of 6420698 is about 185.8634871449.

The spelling of 6420698 in words is "six million, four hundred twenty thousand, six hundred ninety-eight".