72603731 has 16 divisors (see below), whose sum is σ = 79161600. Its totient is φ = 66352608.

The previous prime is 72603721. The next prime is 72603761. The reversal of 72603731 is 13730627.

It is a cyclic number.

It is not a de Polignac number, because 72603731 - 2¹⁰ = 72602707 is a prime.

It is a super-2 number, since 2×72603731² = 10542603510240722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72603694 and 72603703.

It is not an unprimeable number, because it can be changed into a prime (72603721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97346 + ... + 98088.

It is an arithmetic number, because the mean of its divisors is an integer number (4947600).

Almost surely, 2^72603731 is an apocalyptic number.

72603731 is a deficient number, since it is larger than the sum of its proper divisors (6557869).

72603731 is a wasteful number, since it uses less digits than its factorization.

72603731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 72603731 is about 8520.7822997657. The cubic root of 72603731 is about 417.1763176577.

The spelling of 72603731 in words is "seventy-two million, six hundred three thousand, seven hundred thirty-one".