670421501 has 2 divisors, whose sum is σ = 670421502. Its totient is φ = 670421500.

The previous prime is 670421473. The next prime is 670421509. The reversal of 670421501 is 105124076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 473019001 + 197402500 = 21749^2 + 14050^2 .

It is a cyclic number.

It is not a de Polignac number, because 670421501 - 2²² = 666227197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670421509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335210750 + 335210751.

It is an arithmetic number, because the mean of its divisors is an integer number (335210751).

Almost surely, 2^670421501 is an apocalyptic number.

It is an amenable number.

670421501 is a deficient number, since it is larger than the sum of its proper divisors (1).

670421501 is an equidigital number, since it uses as much as digits as its factorization.

670421501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 670421501 is about 25892.4989330887. The cubic root of 670421501 is about 875.2174701910.

Adding to 670421501 its reverse (105124076), we get a palindrome (775545577).

The spelling of 670421501 in words is "six hundred seventy million, four hundred twenty-one thousand, five hundred one".