87400829 has 2 divisors, whose sum is σ = 87400830. Its totient is φ = 87400828.

The previous prime is 87400769. The next prime is 87400843. The reversal of 87400829 is 92800478.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81631225 + 5769604 = 9035^2 + 2402^2 .

It is a cyclic number.

It is not a de Polignac number, because 87400829 - 2¹² = 87396733 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 87400792 and 87400801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87400849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43700414 + 43700415.

It is an arithmetic number, because the mean of its divisors is an integer number (43700415).

Almost surely, 2^87400829 is an apocalyptic number.

It is an amenable number.

87400829 is a deficient number, since it is larger than the sum of its proper divisors (1).

87400829 is an equidigital number, since it uses as much as digits as its factorization.

87400829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 87400829 is about 9348.8410511678. The cubic root of 87400829 is about 443.7842149377.

The spelling of 87400829 in words is "eighty-seven million, four hundred thousand, eight hundred twenty-nine".