1368771457 has 4 divisors (see below), whose sum is σ = 1440812080. Its totient is φ = 1296730836.

The previous prime is 1368771433. The next prime is 1368771479. The reversal of 1368771457 is 7541778631.

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: 7541778631 = 18077 ⋅417203.

It is a cyclic number.

It is not a de Polignac number, because 1368771457 - 2¹⁵ = 1368738689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1368771457.

It is not an unprimeable number, because it can be changed into a prime (1368771487) 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, 36020283 + ... + 36020320.

It is an arithmetic number, because the mean of its divisors is an integer number (360203020).

Almost surely, 2^1368771457 is an apocalyptic number.

It is an amenable number.

1368771457 is a deficient number, since it is larger than the sum of its proper divisors (72040623).

1368771457 is an equidigital number, since it uses as much as digits as its factorization.

1368771457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72040622.

The product of its digits is 987840, while the sum is 49.

The square root of 1368771457 is about 36996.9114521740. The cubic root of 1368771457 is about 1110.3084544384.

The spelling of 1368771457 in words is "one billion, three hundred sixty-eight million, seven hundred seventy-one thousand, four hundred fifty-seven".