87297691 has 8 divisors (see below), whose sum is σ = 94086720. Its totient is φ = 80519232.

The previous prime is 87297677. The next prime is 87297709. The reversal of 87297691 is 19679278.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 87297691 - 2¹⁹ = 86773403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87297391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26430 + ... + 29548.

It is an arithmetic number, because the mean of its divisors is an integer number (11760840).

Almost surely, 2^87297691 is an apocalyptic number.

87297691 is a deficient number, since it is larger than the sum of its proper divisors (6789029).

87297691 is a wasteful number, since it uses less digits than its factorization.

87297691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5285.

The product of its digits is 381024, while the sum is 49.

The square root of 87297691 is about 9343.3233380848. The cubic root of 87297691 is about 443.6095826036.

The spelling of 87297691 in words is "eighty-seven million, two hundred ninety-seven thousand, six hundred ninety-one".