87831477029 has 2 divisors, whose sum is σ = 87831477030. Its totient is φ = 87831477028.

The previous prime is 87831476983. The next prime is 87831477031. The reversal of 87831477029 is 92077413878.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75074904004 + 12756573025 = 273998^2 + 112945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87831477029 is a prime.

Together with 87831477031, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87831477329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43915738514 + 43915738515.

It is an arithmetic number, because the mean of its divisors is an integer number (43915738515).

Almost surely, 2^87831477029 is an apocalyptic number.

It is an amenable number.

87831477029 is a deficient number, since it is larger than the sum of its proper divisors (1).

87831477029 is an equidigital number, since it uses as much as digits as its factorization.

87831477029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The spelling of 87831477029 in words is "eighty-seven billion, eight hundred thirty-one million, four hundred seventy-seven thousand, twenty-nine".