53491917 has 16 divisors (see below), whose sum is σ = 72370688. Its totient is φ = 35141040.

The previous prime is 53491913. The next prime is 53491931. The reversal of 53491917 is 71919435.

It is a happy number.

It is not a de Polignac number, because 53491917 - 2² = 53491913 is a prime.

It is a super-2 number, since 2×53491917² = 5722770368669778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53491913) 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, 102018 + ... + 102540.

It is an arithmetic number, because the mean of its divisors is an integer number (4523168).

Almost surely, 2^53491917 is an apocalyptic number.

It is an amenable number.

53491917 is a deficient number, since it is larger than the sum of its proper divisors (18878771).

53491917 is a wasteful number, since it uses less digits than its factorization.

53491917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960.

The product of its digits is 34020, while the sum is 39.

The square root of 53491917 is about 7313.8168557874. The cubic root of 53491917 is about 376.7871247421.

The spelling of 53491917 in words is "fifty-three million, four hundred ninety-one thousand, nine hundred seventeen".