138087345 has 64 divisors (see below), whose sum is σ = 268738560. Its totient is φ = 59673600.

The previous prime is 138087343. The next prime is 138087371. The reversal of 138087345 is 543780831.

It is not a de Polignac number, because 138087345 - 2¹ = 138087343 is a prime.

It is a super-2 number, since 2×138087345² = 38136229698298050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138087343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52000 + ... + 54590.

It is an arithmetic number, because the mean of its divisors is an integer number (4199040).

Almost surely, 2^138087345 is an apocalyptic number.

138087345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138087345 is a deficient number, since it is larger than the sum of its proper divisors (130651215).

138087345 is a wasteful number, since it uses less digits than its factorization.

138087345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 138087345 is about 11751.0571864833. The cubic root of 138087345 is about 516.8739284075.

The spelling of 138087345 in words is "one hundred thirty-eight million, eighty-seven thousand, three hundred forty-five".