72106633 has 4 divisors (see below), whose sum is σ = 75241728. Its totient is φ = 68971540.

The previous prime is 72106631. The next prime is 72106693. The reversal of 72106633 is 33660127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33660127 = 379 ⋅88813.

It is a cyclic number.

It is not a de Polignac number, because 72106633 - 2¹ = 72106631 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72106631) 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, 1567513 + ... + 1567558.

It is an arithmetic number, because the mean of its divisors is an integer number (18810432).

Almost surely, 2^72106633 is an apocalyptic number.

It is an amenable number.

72106633 is a deficient number, since it is larger than the sum of its proper divisors (3135095).

72106633 is a wasteful number, since it uses less digits than its factorization.

72106633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135094.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 72106633 is about 8491.5624592886. The cubic root of 72106633 is about 416.2220388412. Note that the first 3 decimals are identical.

The spelling of 72106633 in words is "seventy-two million, one hundred six thousand, six hundred thirty-three".