72691355 has 24 divisors (see below), whose sum is σ = 97732656. Its totient is φ = 51846080.

The previous prime is 72691351. The next prime is 72691361. The reversal of 72691355 is 55319627.

It is a happy number.

It is not a de Polignac number, because 72691355 - 2² = 72691351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72691351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30932 + ... + 33198.

It is an arithmetic number, because the mean of its divisors is an integer number (4072194).

Almost surely, 2^72691355 is an apocalyptic number.

72691355 is a deficient number, since it is larger than the sum of its proper divisors (25041301).

72691355 is a wasteful number, since it uses less digits than its factorization.

72691355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347 (or 2336 counting only the distinct ones).

The product of its digits is 56700, while the sum is 38.

The square root of 72691355 is about 8525.9225307294. The cubic root of 72691355 is about 417.3440774560.

The spelling of 72691355 in words is "seventy-two million, six hundred ninety-one thousand, three hundred fifty-five".