91072053 has 16 divisors (see below), whose sum is σ = 135298240. Its totient is φ = 60545232.

The previous prime is 91072049. The next prime is 91072057. The reversal of 91072053 is 35027019.

It is an interprime number because it is at equal distance from previous prime (91072049) and next prime (91072057).

It is not a de Polignac number, because 91072053 - 2² = 91072049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91072057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5550 + ... + 14592.

It is an arithmetic number, because the mean of its divisors is an integer number (8456140).

Almost surely, 2^91072053 is an apocalyptic number.

It is an amenable number.

91072053 is a deficient number, since it is larger than the sum of its proper divisors (44226187).

91072053 is a wasteful number, since it uses less digits than its factorization.

91072053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9425 (or 9419 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 91072053 is about 9543.1678702619. The cubic root of 91072053 is about 449.9128275588.

The spelling of 91072053 in words is "ninety-one million, seventy-two thousand, fifty-three".