72687423 has 4 divisors (see below), whose sum is σ = 96916568. Its totient is φ = 48458280.

The previous prime is 72687403. The next prime is 72687431. The reversal of 72687423 is 32478627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32478627 = 3 ⋅10826209.

It is not a de Polignac number, because 72687423 - 2¹³ = 72679231 is a prime.

It is a super-2 number, since 2×72687423² = 10566922924761858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72687403) 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, 12114568 + ... + 12114573.

It is an arithmetic number, because the mean of its divisors is an integer number (24229142).

Almost surely, 2^72687423 is an apocalyptic number.

72687423 is a deficient number, since it is larger than the sum of its proper divisors (24229145).

72687423 is a wasteful number, since it uses less digits than its factorization.

72687423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24229144.

The product of its digits is 112896, while the sum is 39.

The square root of 72687423 is about 8525.6919367287. The cubic root of 72687423 is about 417.3365523682.

The spelling of 72687423 in words is "seventy-two million, six hundred eighty-seven thousand, four hundred twenty-three".