53697381 has 8 divisors (see below), whose sum is σ = 71697120. Its totient is φ = 35747952.

The previous prime is 53697379. The next prime is 53697383. The reversal of 53697381 is 18379635.

It is an interprime number because it is at equal distance from previous prime (53697379) and next prime (53697383).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53697381 - 2¹ = 53697379 is a prime.

It is a super-2 number, since 2×53697381² = 5766817452518322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53697383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10011 + ... + 14408.

It is an arithmetic number, because the mean of its divisors is an integer number (8962140).

Almost surely, 2^53697381 is an apocalyptic number.

It is an amenable number.

53697381 is a deficient number, since it is larger than the sum of its proper divisors (17999739).

53697381 is a wasteful number, since it uses less digits than its factorization.

53697381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25155.

The product of its digits is 136080, while the sum is 42.

The square root of 53697381 is about 7327.8496845937. The cubic root of 53697381 is about 377.2689251450.

The spelling of 53697381 in words is "fifty-three million, six hundred ninety-seven thousand, three hundred eighty-one".