72442403 has 4 divisors (see below), whose sum is σ = 79028088. Its totient is φ = 65856720.

The previous prime is 72442399. The next prime is 72442417. The reversal of 72442403 is 30424427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30424427 = 11 ⋅2765857.

It is a cyclic number.

It is not a de Polignac number, because 72442403 - 2² = 72442399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72442453) 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, 3292826 + ... + 3292847.

It is an arithmetic number, because the mean of its divisors is an integer number (19757022).

Almost surely, 2^72442403 is an apocalyptic number.

72442403 is a deficient number, since it is larger than the sum of its proper divisors (6585685).

72442403 is a wasteful number, since it uses less digits than its factorization.

72442403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6585684.

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 72442403 is about 8511.3102986555. The cubic root of 72442403 is about 416.8670951106.

The spelling of 72442403 in words is "seventy-two million, four hundred forty-two thousand, four hundred three".