72947547 has 10 divisors (see below), whose sum is σ = 108971148. Its totient is φ = 48631644.

The previous prime is 72947543. The next prime is 72947549. The reversal of 72947547 is 74574927.

It is not a de Polignac number, because 72947547 - 2² = 72947543 is a prime.

It is a super-2 number, since 2×72947547² = 10642689226634418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72947543) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 450213 + ... + 450374.

Almost surely, 2^72947547 is an apocalyptic number.

72947547 is a deficient number, since it is larger than the sum of its proper divisors (36023601).

72947547 is an equidigital number, since it uses as much as digits as its factorization.

72947547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900599 (or 900590 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 72947547 is about 8540.9336140729. The cubic root of 72947547 is about 417.8337957088.

It can be divided in two parts, 7294 and 7547, that added together give a palindrome (14841).

The spelling of 72947547 in words is "seventy-two million, nine hundred forty-seven thousand, five hundred forty-seven".