72748153 has 4 divisors (see below), whose sum is σ = 75256740. Its totient is φ = 70239568.

The previous prime is 72748147. The next prime is 72748163. The reversal of 72748153 is 35184727.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20142144 + 52606009 = 4488^2 + 7253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72748153 is a prime.

It is a super-2 number, since 2×72748153² = 10584587529822818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72748133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1254250 + ... + 1254307.

It is an arithmetic number, because the mean of its divisors is an integer number (18814185).

Almost surely, 2^72748153 is an apocalyptic number.

It is an amenable number.

72748153 is a deficient number, since it is larger than the sum of its proper divisors (2508587).

72748153 is a wasteful number, since it uses less digits than its factorization.

72748153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508586.

The product of its digits is 47040, while the sum is 37.

The square root of 72748153 is about 8529.2527808713. The cubic root of 72748153 is about 417.4527475894.

It can be divided in two parts, 72 and 748153, that added together give a square (748225 = 865²).

The spelling of 72748153 in words is "seventy-two million, seven hundred forty-eight thousand, one hundred fifty-three".