72123398 has 8 divisors (see below), whose sum is σ = 108585120. Its totient is φ = 35928360.

The previous prime is 72123383. The next prime is 72123413. The reversal of 72123398 is 89332127.

It is an interprime number because it is at equal distance from previous prime (72123383) and next prime (72123413).

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65993 + ... + 67076.

It is an arithmetic number, because the mean of its divisors is an integer number (13573140).

Almost surely, 2^72123398 is an apocalyptic number.

72123398 is a deficient number, since it is larger than the sum of its proper divisors (36461722).

72123398 is a wasteful number, since it uses less digits than its factorization.

72123398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133342.

The product of its digits is 18144, while the sum is 35.

The square root of 72123398 is about 8492.5495582893. The cubic root of 72123398 is about 416.2542939494.

The spelling of 72123398 in words is "seventy-two million, one hundred twenty-three thousand, three hundred ninety-eight".