671137801 has 2 divisors, whose sum is σ = 671137802. Its totient is φ = 671137800.

The previous prime is 671137793. The next prime is 671137813. The reversal of 671137801 is 108731176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 603979776 + 67158025 = 24576^2 + 8195^2 .

It is a cyclic number.

It is not a de Polignac number, because 671137801 - 2³ = 671137793 is a prime.

It is a super-2 number, since 2×671137801² = 900851895862231202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (671137891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335568900 + 335568901.

It is an arithmetic number, because the mean of its divisors is an integer number (335568901).

Almost surely, 2^671137801 is an apocalyptic number.

It is an amenable number.

671137801 is a deficient number, since it is larger than the sum of its proper divisors (1).

671137801 is an equidigital number, since it uses as much as digits as its factorization.

671137801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 671137801 is about 25906.3274317299. The cubic root of 671137801 is about 875.5290627896.

Adding to 671137801 its reverse (108731176), we get a palindrome (779868977).

The spelling of 671137801 in words is "six hundred seventy-one million, one hundred thirty-seven thousand, eight hundred one".