72103747 has 4 divisors (see below), whose sum is σ = 72198280. Its totient is φ = 72009216.

The previous prime is 72103721. The next prime is 72103751. The reversal of 72103747 is 74730127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74730127 = 71 ⋅1052537.

It is a cyclic number.

It is not a de Polignac number, because 72103747 - 2¹⁵ = 72070979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72103147) 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, 46113 + ... + 47650.

It is an arithmetic number, because the mean of its divisors is an integer number (18049570).

Almost surely, 2^72103747 is an apocalyptic number.

72103747 is a deficient number, since it is larger than the sum of its proper divisors (94533).

72103747 is an equidigital number, since it uses as much as digits as its factorization.

72103747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94532.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 72103747 is about 8491.3925241977. The cubic root of 72103747 is about 416.2164858022.

The spelling of 72103747 in words is "seventy-two million, one hundred three thousand, seven hundred forty-seven".