72091535 has 16 divisors (see below), whose sum is σ = 89907840. Its totient is φ = 55426560.

The previous prime is 72091517. The next prime is 72091553. The reversal of 72091535 is 53519027.

It is an interprime number because it is at equal distance from previous prime (72091517) and next prime (72091553).

It is not a de Polignac number, because 72091535 - 2⁶ = 72091471 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33914 + ... + 35976.

It is an arithmetic number, because the mean of its divisors is an integer number (5619240).

Almost surely, 2^72091535 is an apocalyptic number.

72091535 is a deficient number, since it is larger than the sum of its proper divisors (17816305).

72091535 is a wasteful number, since it uses less digits than its factorization.

72091535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 72091535 is about 8490.6734126334. The cubic root of 72091535 is about 416.1929866873.

The spelling of 72091535 in words is "seventy-two million, ninety-one thousand, five hundred thirty-five".