1388054263 has 4 divisors (see below), whose sum is σ = 1395246448. Its totient is φ = 1380862080.

The previous prime is 1388054251. The next prime is 1388054281. The reversal of 1388054263 is 3624508831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3624508831 = 42451 ⋅85381.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1388054263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388057263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3595803 + ... + 3596188.

It is an arithmetic number, because the mean of its divisors is an integer number (348811612).

Almost surely, 2^1388054263 is an apocalyptic number.

1388054263 is a deficient number, since it is larger than the sum of its proper divisors (7192185).

1388054263 is an equidigital number, since it uses as much as digits as its factorization.

1388054263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7192184.

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

The square root of 1388054263 is about 37256.6002608934. The cubic root of 1388054263 is about 1115.4980482595.

The spelling of 1388054263 in words is "one billion, three hundred eighty-eight million, fifty-four thousand, two hundred sixty-three".