53187394 has 8 divisors (see below), whose sum is σ = 85918140. Its totient is φ = 24548016.

The previous prime is 53187391. The next prime is 53187401. The reversal of 53187394 is 49378135.

It can be written as a sum of positive squares in 2 ways, for example, as 53100369 + 87025 = 7287^2 + 295^2 .

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

It is a super-2 number, since 2×53187394² = 5657797761022472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53187391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022809 + ... + 1022860.

Almost surely, 2^53187394 is an apocalyptic number.

53187394 is a deficient number, since it is larger than the sum of its proper divisors (32730746).

53187394 is a wasteful number, since it uses less digits than its factorization.

53187394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045684.

The product of its digits is 90720, while the sum is 40.

The square root of 53187394 is about 7292.9688056374. The cubic root of 53187394 is about 376.0707624853.

The spelling of 53187394 in words is "fifty-three million, one hundred eighty-seven thousand, three hundred ninety-four".