1388537161 has 8 divisors (see below), whose sum is σ = 1535518944. Its totient is φ = 1245013920.

The previous prime is 1388537159. The next prime is 1388537177. The reversal of 1388537161 is 1617358831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1388537161 - 2¹ = 1388537159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388537141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863791 + ... + 865396.

It is an arithmetic number, because the mean of its divisors is an integer number (191939868).

Almost surely, 2^1388537161 is an apocalyptic number.

1388537161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1388537161 is a deficient number, since it is larger than the sum of its proper divisors (146981783).

1388537161 is a wasteful number, since it uses less digits than its factorization.

1388537161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729271.

The product of its digits is 120960, while the sum is 43.

The square root of 1388537161 is about 37263.0804013839. The cubic root of 1388537161 is about 1115.6273922234.

The spelling of 1388537161 in words is "one billion, three hundred eighty-eight million, five hundred thirty-seven thousand, one hundred sixty-one".