87891474701 has 2 divisors, whose sum is σ = 87891474702. Its totient is φ = 87891474700.

The previous prime is 87891474661. The next prime is 87891474709. The reversal of 87891474701 is 10747419878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87447361225 + 444113476 = 295715^2 + 21074^2 .

It is a cyclic number.

It is not a de Polignac number, because 87891474701 - 2¹⁸ = 87891212557 is a prime.

It is a super-2 number, since 2×87891474701² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87891474709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43945737350 + 43945737351.

It is an arithmetic number, because the mean of its divisors is an integer number (43945737351).

Almost surely, 2^87891474701 is an apocalyptic number.

It is an amenable number.

87891474701 is a deficient number, since it is larger than the sum of its proper divisors (1).

87891474701 is an equidigital number, since it uses as much as digits as its factorization.

87891474701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3161088, while the sum is 56.

The spelling of 87891474701 in words is "eighty-seven billion, eight hundred ninety-one million, four hundred seventy-four thousand, seven hundred one".