138963610 has 16 divisors (see below), whose sum is σ = 264848616. Its totient is φ = 52315648.

The previous prime is 138963599. The next prime is 138963611. The reversal of 138963610 is 16369831.

It can be written as a sum of positive squares in 4 ways, for example, as 133102369 + 5861241 = 11537^2 + 2421^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138963610.

It is not an unprimeable number, because it can be changed into a prime (138963611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408547 + ... + 408886.

Almost surely, 2^138963610 is an apocalyptic number.

138963610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138963610 is a deficient number, since it is larger than the sum of its proper divisors (125885006).

138963610 is a wasteful number, since it uses less digits than its factorization.

138963610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817457.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 138963610 is about 11788.2827417737. The cubic root of 138963610 is about 517.9649380222.

The spelling of 138963610 in words is "one hundred thirty-eight million, nine hundred sixty-three thousand, six hundred ten".