1351663671 has 8 divisors (see below), whose sum is σ = 1808632944. Its totient is φ = 897901760.

The previous prime is 1351663619. The next prime is 1351663699. The reversal of 1351663671 is 1763661531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1351663671 - 2⁷ = 1351663543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351663571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 800856 + ... + 802541.

It is an arithmetic number, because the mean of its divisors is an integer number (226079118).

Almost surely, 2^1351663671 is an apocalyptic number.

1351663671 is a deficient number, since it is larger than the sum of its proper divisors (456969273).

1351663671 is a wasteful number, since it uses less digits than its factorization.

1351663671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603681.

The product of its digits is 68040, while the sum is 39.

The square root of 1351663671 is about 36764.9788657630. The cubic root of 1351663671 is about 1105.6632644361.

The spelling of 1351663671 in words is "one billion, three hundred fifty-one million, six hundred sixty-three thousand, six hundred seventy-one".