138693470 has 8 divisors (see below), whose sum is σ = 249648264. Its totient is φ = 55477384.

The previous prime is 138693461. The next prime is 138693479. The reversal of 138693470 is 74396831.

It is an interprime number because it is at equal distance from previous prime (138693461) and next prime (138693479).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138693479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6934664 + ... + 6934683.

It is an arithmetic number, because the mean of its divisors is an integer number (31206033).

Almost surely, 2^138693470 is an apocalyptic number.

138693470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138693470 is a deficient number, since it is larger than the sum of its proper divisors (110954794).

138693470 is a wasteful number, since it uses less digits than its factorization.

138693470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13869354.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 138693470 is about 11776.8191800673. The cubic root of 138693470 is about 517.6290855527.

The spelling of 138693470 in words is "one hundred thirty-eight million, six hundred ninety-three thousand, four hundred seventy".