1369357993 has 4 divisors (see below), whose sum is σ = 1389796240. Its totient is φ = 1348919748.

The previous prime is 1369357991. The next prime is 1369358059. The reversal of 1369357993 is 3997539631.

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: 3997539631 = 59 ⋅67754909.

It is a cyclic number.

It is not a de Polignac number, because 1369357993 - 2¹ = 1369357991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1369357991) 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, 10219023 + ... + 10219156.

It is an arithmetic number, because the mean of its divisors is an integer number (347449060).

Almost surely, 2^1369357993 is an apocalyptic number.

It is an amenable number.

1369357993 is a deficient number, since it is larger than the sum of its proper divisors (20438247).

1369357993 is an equidigital number, since it uses as much as digits as its factorization.

1369357993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20438246.

The product of its digits is 4133430, while the sum is 55.

The square root of 1369357993 is about 37004.8374270176. The cubic root of 1369357993 is about 1110.4670255613.

The spelling of 1369357993 in words is "one billion, three hundred sixty-nine million, three hundred fifty-seven thousand, nine hundred ninety-three".