72615707 has 4 divisors (see below), whose sum is σ = 72635256. Its totient is φ = 72596160.

The previous prime is 72615689. The next prime is 72615709. The reversal of 72615707 is 70751627.

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

It is a cyclic number.

It is not a de Polignac number, because 72615707 - 2⁶ = 72615643 is a prime.

It is a Duffinian number.

It is a plaindrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (72615709) 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, 2294 + ... + 12267.

It is an arithmetic number, because the mean of its divisors is an integer number (18158814).

Almost surely, 2^72615707 is an apocalyptic number.

72615707 is a deficient number, since it is larger than the sum of its proper divisors (19549).

72615707 is a wasteful number, since it uses less digits than its factorization.

72615707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19548.

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

The square root of 72615707 is about 8521.4850231635. The cubic root of 72615707 is about 417.1992541691.

The spelling of 72615707 in words is "seventy-two million, six hundred fifteen thousand, seven hundred seven".