72395851 has 4 divisors (see below), whose sum is σ = 78977304. Its totient is φ = 65814400.

The previous prime is 72395849. The next prime is 72395857. The reversal of 72395851 is 15859327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15859327 = 11 ⋅1441757.

It is a cyclic number.

It is not a de Polignac number, because 72395851 - 2¹ = 72395849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72395857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3290710 + ... + 3290731.

It is an arithmetic number, because the mean of its divisors is an integer number (19744326).

Almost surely, 2^72395851 is an apocalyptic number.

72395851 is a deficient number, since it is larger than the sum of its proper divisors (6581453).

72395851 is a wasteful number, since it uses less digits than its factorization.

72395851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6581452.

The product of its digits is 75600, while the sum is 40.

The square root of 72395851 is about 8508.5751451110. The cubic root of 72395851 is about 416.7777820632. Note that the first 4 decimals are identical.

The spelling of 72395851 in words is "seventy-two million, three hundred ninety-five thousand, eight hundred fifty-one".