87898765 has 8 divisors (see below), whose sum is σ = 105779448. Its totient is φ = 70118400.

The previous prime is 87898763. The next prime is 87898777. The reversal of 87898765 is 56789878.

87898765 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 4 ways, for example, as 3736489 + 84162276 = 1933^2 + 9174^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87898765 - 2¹ = 87898763 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87898763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23136 + ... + 26665.

It is an arithmetic number, because the mean of its divisors is an integer number (13222431).

Almost surely, 2^87898765 is an apocalyptic number.

It is an amenable number.

87898765 is a deficient number, since it is larger than the sum of its proper divisors (17880683).

87898765 is a wasteful number, since it uses less digits than its factorization.

87898765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50159.

The product of its digits is 6773760, while the sum is 58.

The square root of 87898765 is about 9375.4341232820. The cubic root of 87898765 is about 444.6253885571.

The spelling of 87898765 in words is "eighty-seven million, eight hundred ninety-eight thousand, seven hundred sixty-five".