72671507 has 4 divisors (see below), whose sum is σ = 72709656. Its totient is φ = 72633360.

The previous prime is 72671503. The next prime is 72671519. The reversal of 72671507 is 70517627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70517627 = 919 ⋅76733.

It is a cyclic number.

It is not a de Polignac number, because 72671507 - 2² = 72671503 is a prime.

It is a super-2 number, since 2×72671507² = 10562295859302098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72671503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16058 + ... + 20079.

It is an arithmetic number, because the mean of its divisors is an integer number (18177414).

Almost surely, 2^72671507 is an apocalyptic number.

72671507 is a deficient number, since it is larger than the sum of its proper divisors (38149).

72671507 is a wasteful number, since it uses less digits than its factorization.

72671507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38148.

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 72671507 is about 8524.7584716519. The cubic root of 72671507 is about 417.3060894482.

The spelling of 72671507 in words is "seventy-two million, six hundred seventy-one thousand, five hundred seven".