1368699261 has 4 divisors (see below), whose sum is σ = 1824932352. Its totient is φ = 912466172.

The previous prime is 1368699247. The next prime is 1368699263. The reversal of 1368699261 is 1629968631.

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: 1629968631 = 3 ⋅543322877.

It is a cyclic number.

It is not a de Polignac number, because 1368699261 - 2⁵ = 1368699229 is a prime.

It is a super-2 number, since 2×1368699261² = 3746675334123892242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368699263) 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, 228116541 + ... + 228116546.

It is an arithmetic number, because the mean of its divisors is an integer number (456233088).

Almost surely, 2^1368699261 is an apocalyptic number.

It is an amenable number.

1368699261 is a deficient number, since it is larger than the sum of its proper divisors (456233091).

1368699261 is an equidigital number, since it uses as much as digits as its factorization.

1368699261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456233090.

The product of its digits is 839808, while the sum is 51.

The square root of 1368699261 is about 36995.9357362400. The cubic root of 1368699261 is about 1110.2889329816.

The spelling of 1368699261 in words is "one billion, three hundred sixty-eight million, six hundred ninety-nine thousand, two hundred sixty-one".