671420501 has 2 divisors, whose sum is σ = 671420502. Its totient is φ = 671420500.

The previous prime is 671420479. The next prime is 671420507. The reversal of 671420501 is 105024176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 628504900 + 42915601 = 25070^2 + 6551^2 .

It is a cyclic number.

It is not a de Polignac number, because 671420501 - 2⁶ = 671420437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671420507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335710250 + 335710251.

It is an arithmetic number, because the mean of its divisors is an integer number (335710251).

Almost surely, 2^671420501 is an apocalyptic number.

It is an amenable number.

671420501 is a deficient number, since it is larger than the sum of its proper divisors (1).

671420501 is an equidigital number, since it uses as much as digits as its factorization.

671420501 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 671420501 is about 25911.7830532752. The cubic root of 671420501 is about 875.6519771007.

Adding to 671420501 its reverse (105024176), we get a palindrome (776444677).

The spelling of 671420501 in words is "six hundred seventy-one million, four hundred twenty thousand, five hundred one".