138870743 has 4 divisors (see below), whose sum is σ = 151495368. Its totient is φ = 126246120.

The previous prime is 138870713. The next prime is 138870749. The reversal of 138870743 is 347078831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 347078831 = 11 ⋅31552621.

It is not a de Polignac number, because 138870743 - 2⁶ = 138870679 is a prime.

It is a super-2 number, since 2×138870743² = 38570166522744098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138870743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138870749) 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, 6312296 + ... + 6312317.

It is an arithmetic number, because the mean of its divisors is an integer number (37873842).

Almost surely, 2^138870743 is an apocalyptic number.

138870743 is a deficient number, since it is larger than the sum of its proper divisors (12624625).

138870743 is a wasteful number, since it uses less digits than its factorization.

138870743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12624624.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 138870743 is about 11784.3431297633. The cubic root of 138870743 is about 517.8495299450.

The spelling of 138870743 in words is "one hundred thirty-eight million, eight hundred seventy thousand, seven hundred forty-three".