72691851 has 8 divisors (see below), whose sum is σ = 98369344. Its totient is φ = 47737800.

The previous prime is 72691849. The next prime is 72691873. The reversal of 72691851 is 15819627.

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

It is not a de Polignac number, because 72691851 - 2¹ = 72691849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72691351) 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 7 ways as a sum of consecutive naturals, for example, 180625 + ... + 181026.

It is an arithmetic number, because the mean of its divisors is an integer number (12296168).

Almost surely, 2^72691851 is an apocalyptic number.

72691851 is a deficient number, since it is larger than the sum of its proper divisors (25677493).

72691851 is a wasteful number, since it uses less digits than its factorization.

72691851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361721.

The product of its digits is 30240, while the sum is 39.

The square root of 72691851 is about 8525.9516184412. The cubic root of 72691851 is about 417.3450266849.

The spelling of 72691851 in words is "seventy-two million, six hundred ninety-one thousand, eight hundred fifty-one".