138497061 has 8 divisors (see below), whose sum is σ = 194381920. Its totient is φ = 87471792.

The previous prime is 138497059. The next prime is 138497063. The reversal of 138497061 is 160794831.

It is an interprime number because it is at equal distance from previous prime (138497059) and next prime (138497063).

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

It is not a de Polignac number, because 138497061 - 2¹ = 138497059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138497063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1214830 + ... + 1214943.

It is an arithmetic number, because the mean of its divisors is an integer number (24297740).

Almost surely, 2^138497061 is an apocalyptic number.

It is an amenable number.

138497061 is a deficient number, since it is larger than the sum of its proper divisors (55884859).

138497061 is a wasteful number, since it uses less digits than its factorization.

138497061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429795.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 138497061 is about 11768.4774291325. The cubic root of 138497061 is about 517.3846254967.

It can be divided in two parts, 13849 and 7061, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 138497061 in words is "one hundred thirty-eight million, four hundred ninety-seven thousand, sixty-one".