87381253 has 2 divisors, whose sum is σ = 87381254. Its totient is φ = 87381252.

The previous prime is 87381251. The next prime is 87381293. The reversal of 87381253 is 35218378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49028004 + 38353249 = 7002^2 + 6193^2 .

It is a cyclic number.

It is not a de Polignac number, because 87381253 - 2¹ = 87381251 is a prime.

Together with 87381251, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87381251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43690626 + 43690627.

It is an arithmetic number, because the mean of its divisors is an integer number (43690627).

Almost surely, 2^87381253 is an apocalyptic number.

It is an amenable number.

87381253 is a deficient number, since it is larger than the sum of its proper divisors (1).

87381253 is an equidigital number, since it uses as much as digits as its factorization.

87381253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 87381253 is about 9347.7940178419. The cubic root of 87381253 is about 443.7510795980.

The spelling of 87381253 in words is "eighty-seven million, three hundred eighty-one thousand, two hundred fifty-three".