1391362897 has 4 divisors (see below), whose sum is σ = 1451856960. Its totient is φ = 1330868836.

The previous prime is 1391362891. The next prime is 1391362901. The reversal of 1391362897 is 7982631931.

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: 7982631931 = 4231 ⋅1886701.

It is a cyclic number.

It is not a de Polignac number, because 1391362897 - 2¹¹ = 1391360849 is a prime.

It is a super-2 number, since 2×1391362897² = 3871781422296465218, which contains 22 as substring.

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 1391362897.

It is not an unprimeable number, because it can be changed into a prime (1391362891) 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, 30246997 + ... + 30247042.

It is an arithmetic number, because the mean of its divisors is an integer number (362964240).

Almost surely, 2^1391362897 is an apocalyptic number.

It is an amenable number.

1391362897 is a deficient number, since it is larger than the sum of its proper divisors (60494063).

1391362897 is an equidigital number, since it uses as much as digits as its factorization.

1391362897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60494062.

The product of its digits is 489888, while the sum is 49.

The square root of 1391362897 is about 37300.9771587823. The cubic root of 1391362897 is about 1116.3836635272.

The spelling of 1391362897 in words is "one billion, three hundred ninety-one million, three hundred sixty-two thousand, eight hundred ninety-seven".