72167061 has 4 divisors (see below), whose sum is σ = 96222752. Its totient is φ = 48111372.

The previous prime is 72167059. The next prime is 72167063. The reversal of 72167061 is 16076127.

It is a happy number.

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: 16076127 = 3 ⋅5358709.

It is an interprime number because it is at equal distance from previous prime (72167059) and next prime (72167063).

It is not a de Polignac number, because 72167061 - 2¹ = 72167059 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 (72167063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12027841 + ... + 12027846.

It is an arithmetic number, because the mean of its divisors is an integer number (24055688).

Almost surely, 2^72167061 is an apocalyptic number.

It is an amenable number.

72167061 is a deficient number, since it is larger than the sum of its proper divisors (24055691).

72167061 is a wasteful number, since it uses less digits than its factorization.

72167061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24055690.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 72167061 is about 8495.1198343520. The cubic root of 72167061 is about 416.3382761490.

The spelling of 72167061 in words is "seventy-two million, one hundred sixty-seven thousand, sixty-one".