72705351 has 8 divisors (see below), whose sum is σ = 98529904. Its totient is φ = 47675520.

The previous prime is 72705329. The next prime is 72705361. The reversal of 72705351 is 15350727.

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

It is not a de Polignac number, because 72705351 - 2⁵ = 72705319 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 (72705301) 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 7 ways as a sum of consecutive naturals, for example, 198466 + ... + 198831.

It is an arithmetic number, because the mean of its divisors is an integer number (12316238).

Almost surely, 2^72705351 is an apocalyptic number.

72705351 is a deficient number, since it is larger than the sum of its proper divisors (25824553).

72705351 is a wasteful number, since it uses less digits than its factorization.

72705351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397361.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 72705351 is about 8526.7432821682. The cubic root of 72705351 is about 417.3708608925.

It can be divided in two parts, 7270 and 5351, that added together give a palindrome (12621).

The spelling of 72705351 in words is "seventy-two million, seven hundred five thousand, three hundred fifty-one".