1364208385 has 4 divisors (see below), whose sum is σ = 1637050068. Its totient is φ = 1091366704.

The previous prime is 1364208371. The next prime is 1364208409. The reversal of 1364208385 is 5838024631.

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 237129201 + 1127079184 = 15399^2 + 33572^2 .

It is a cyclic number.

It is not a de Polignac number, because 1364208385 - 2⁵ = 1364208353 is a prime.

It is a super-2 number, since 2×1364208385² = 3722129035408616450, which contains 22 as substring.

It is a Duffinian number.

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, 136420834 + ... + 136420843.

It is an arithmetic number, because the mean of its divisors is an integer number (409262517).

Almost surely, 2^1364208385 is an apocalyptic number.

It is an amenable number.

1364208385 is a deficient number, since it is larger than the sum of its proper divisors (272841683).

1364208385 is an equidigital number, since it uses as much as digits as its factorization.

1364208385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272841682.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 1364208385 is about 36935.1916876033. The cubic root of 1364208385 is about 1109.0732694569.

The spelling of 1364208385 in words is "one billion, three hundred sixty-four million, two hundred eight thousand, three hundred eighty-five".