72857503 has 4 divisors (see below), whose sum is σ = 72877320. Its totient is φ = 72837688.

The previous prime is 72857497. The next prime is 72857509. The reversal of 72857503 is 30575827.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (72857497) and next prime (72857509).

It is a cyclic number.

It is not a de Polignac number, because 72857503 - 2¹⁷ = 72726431 is a prime.

It is a super-3 number, since 3×72857503³ (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 (72857509) 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, 2593 + ... + 12346.

It is an arithmetic number, because the mean of its divisors is an integer number (18219330).

Almost surely, 2^72857503 is an apocalyptic number.

72857503 is a deficient number, since it is larger than the sum of its proper divisors (19817).

72857503 is a wasteful number, since it uses less digits than its factorization.

72857503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19816.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 72857503 is about 8535.6606657013. The cubic root of 72857503 is about 417.6618049253.

The spelling of 72857503 in words is "seventy-two million, eight hundred fifty-seven thousand, five hundred three".