72436427 has 4 divisors (see below), whose sum is σ = 82784496. Its totient is φ = 62088360.

The previous prime is 72436423. The next prime is 72436451. The reversal of 72436427 is 72463427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72463427 = 37 ⋅1958471.

It is a cyclic number.

It is not a de Polignac number, because 72436427 - 2² = 72436423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72436423) 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, 5174024 + ... + 5174037.

It is an arithmetic number, because the mean of its divisors is an integer number (20696124).

Almost surely, 2^72436427 is an apocalyptic number.

72436427 is a deficient number, since it is larger than the sum of its proper divisors (10348069).

72436427 is a wasteful number, since it uses less digits than its factorization.

72436427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10348068.

The product of its digits is 56448, while the sum is 35.

The square root of 72436427 is about 8510.9592291351. The cubic root of 72436427 is about 416.8556319060.

Subtracting 72436427 from its reverse (72463427), we obtain a cube (27000 = 30³).

The spelling of 72436427 in words is "seventy-two million, four hundred thirty-six thousand, four hundred twenty-seven".