72587783 has 4 divisors (see below), whose sum is σ = 75090840. Its totient is φ = 70084728.

The previous prime is 72587731. The next prime is 72587797. The reversal of 72587783 is 38778527.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38778527 = 3119 ⋅12433.

It is a cyclic number.

It is not a de Polignac number, because 72587783 - 2²⁴ = 55810567 is a prime.

It is a super-3 number, since 3×72587783³ (a number of 25 digits) contains 333 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 (72587183) 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, 1251485 + ... + 1251542.

It is an arithmetic number, because the mean of its divisors is an integer number (18772710).

Almost surely, 2^72587783 is an apocalyptic number.

72587783 is a deficient number, since it is larger than the sum of its proper divisors (2503057).

72587783 is a wasteful number, since it uses less digits than its factorization.

72587783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503056.

The product of its digits is 658560, while the sum is 47.

The square root of 72587783 is about 8519.8464188036. The cubic root of 72587783 is about 417.1457700305.

The spelling of 72587783 in words is "seventy-two million, five hundred eighty-seven thousand, seven hundred eighty-three".