87503869 has 2 divisors, whose sum is σ = 87503870. Its totient is φ = 87503868.

The previous prime is 87503861. The next prime is 87503887. The reversal of 87503869 is 96830578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84824100 + 2679769 = 9210^2 + 1637^2 .

It is a cyclic number.

It is not a de Polignac number, because 87503869 - 2³ = 87503861 is a prime.

It is a super-2 number, since 2×87503869² = 15313854179938322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87503861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43751934 + 43751935.

It is an arithmetic number, because the mean of its divisors is an integer number (43751935).

Almost surely, 2^87503869 is an apocalyptic number.

It is an amenable number.

87503869 is a deficient number, since it is larger than the sum of its proper divisors (1).

87503869 is an equidigital number, since it uses as much as digits as its factorization.

87503869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 87503869 is about 9354.3502713978. The cubic root of 87503869 is about 443.9585442045.

The spelling of 87503869 in words is "eighty-seven million, five hundred three thousand, eight hundred sixty-nine".