72921453 has 8 divisors (see below), whose sum is σ = 106067616. Its totient is φ = 44194800.

The previous prime is 72921427. The next prime is 72921479. The reversal of 72921453 is 35412927.

It is an interprime number because it is at equal distance from previous prime (72921427) and next prime (72921479).

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

It is not a de Polignac number, because 72921453 - 2⁸ = 72921197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 2209741 = 72921453 / (7 + 2 + 9 + 2 + 1 + 4 + 5 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72921353) 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, 1104838 + ... + 1104903.

It is an arithmetic number, because the mean of its divisors is an integer number (13258452).

Almost surely, 2^72921453 is an apocalyptic number.

It is an amenable number.

72921453 is a deficient number, since it is larger than the sum of its proper divisors (33146163).

72921453 is a wasteful number, since it uses less digits than its factorization.

72921453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209755.

The product of its digits is 15120, while the sum is 33.

The square root of 72921453 is about 8539.4058926836. The cubic root of 72921453 is about 417.7839687861.

The spelling of 72921453 in words is "seventy-two million, nine hundred twenty-one thousand, four hundred fifty-three".