1345688889 has 16 divisors (see below), whose sum is σ = 1949614080. Its totient is φ = 822491280.

The previous prime is 1345688887. The next prime is 1345688893. The reversal of 1345688889 is 9888865431.

It is not a de Polignac number, because 1345688889 - 2¹ = 1345688887 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1345688887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379017 + ... + 382550.

It is an arithmetic number, because the mean of its divisors is an integer number (121850880).

Almost surely, 2^1345688889 is an apocalyptic number.

1345688889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1345688889 is a deficient number, since it is larger than the sum of its proper divisors (603925191).

1345688889 is a wasteful number, since it uses less digits than its factorization.

1345688889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761620.

The product of its digits is 13271040, while the sum is 60.

The square root of 1345688889 is about 36683.6324400951. The cubic root of 1345688889 is about 1104.0317307029.

The spelling of 1345688889 in words is "one billion, three hundred forty-five million, six hundred eighty-eight thousand, eight hundred eighty-nine".