1371668257 has 4 divisors (see below), whose sum is σ = 1400852736. Its totient is φ = 1342483780.

The previous prime is 1371668237. The next prime is 1371668261. The reversal of 1371668257 is 7528661731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7528661731 = 79397 ⋅94823.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1371668257 is a prime.

It is a super-2 number, since 2×1371668257² = 3762947614522836098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1371668237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14592169 + ... + 14592262.

It is an arithmetic number, because the mean of its divisors is an integer number (350213184).

Almost surely, 2^1371668257 is an apocalyptic number.

It is an amenable number.

1371668257 is a deficient number, since it is larger than the sum of its proper divisors (29184479).

1371668257 is an equidigital number, since it uses as much as digits as its factorization.

1371668257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29184478.

The product of its digits is 423360, while the sum is 46.

The square root of 1371668257 is about 37036.0399745977. The cubic root of 1371668257 is about 1111.0911697729.

The spelling of 1371668257 in words is "one billion, three hundred seventy-one million, six hundred sixty-eight thousand, two hundred fifty-seven".