87401029 has 4 divisors (see below), whose sum is σ = 92542284. Its totient is φ = 82259776.

The previous prime is 87401011. The next prime is 87401047. The reversal of 87401029 is 92010478.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (87401011) and next prime (87401047).

It can be written as a sum of positive squares in 2 ways, for example, as 75220929 + 12180100 = 8673^2 + 3490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87401029 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87401009) 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, 2570602 + ... + 2570635.

It is an arithmetic number, because the mean of its divisors is an integer number (23135571).

Almost surely, 2^87401029 is an apocalyptic number.

It is an amenable number.

87401029 is a deficient number, since it is larger than the sum of its proper divisors (5141255).

87401029 is a wasteful number, since it uses less digits than its factorization.

87401029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141254.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 87401029 is about 9348.8517476747. The cubic root of 87401029 is about 443.7845534424.

The spelling of 87401029 in words is "eighty-seven million, four hundred one thousand, twenty-nine".