1367665945 has 4 divisors (see below), whose sum is σ = 1641199140. Its totient is φ = 1094132752.

The previous prime is 1367665939. The next prime is 1367665973. The reversal of 1367665945 is 5495667631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 648568089 + 719097856 = 25467^2 + 26816^2 .

It is a cyclic number.

It is not a de Polignac number, because 1367665945 - 2²¹ = 1365568793 is a prime.

It is a super-2 number, since 2×1367665945² = 3741020274225486050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1367665892 and 1367665901.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136766590 + ... + 136766599.

It is an arithmetic number, because the mean of its divisors is an integer number (410299785).

Almost surely, 2^1367665945 is an apocalyptic number.

It is an amenable number.

1367665945 is a deficient number, since it is larger than the sum of its proper divisors (273533195).

1367665945 is an equidigital number, since it uses as much as digits as its factorization.

1367665945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273533194.

The product of its digits is 4082400, while the sum is 52.

The square root of 1367665945 is about 36981.9678356899. The cubic root of 1367665945 is about 1110.0094539681.

The spelling of 1367665945 in words is "one billion, three hundred sixty-seven million, six hundred sixty-five thousand, nine hundred forty-five".