87190397 has 8 divisors (see below), whose sum is σ = 101011776. Its totient is φ = 73710432.

The previous prime is 87190393. The next prime is 87190403. The reversal of 87190397 is 79309178.

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 87190397 - 2² = 87190393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87190393) 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, 84803 + ... + 85824.

It is an arithmetic number, because the mean of its divisors is an integer number (12626472).

Almost surely, 2^87190397 is an apocalyptic number.

It is an amenable number.

87190397 is a deficient number, since it is larger than the sum of its proper divisors (13821379).

87190397 is a wasteful number, since it uses less digits than its factorization.

87190397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170707.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 87190397 is about 9337.5798256293. The cubic root of 87190397 is about 443.4277673344.

The spelling of 87190397 in words is "eighty-seven million, one hundred ninety thousand, three hundred ninety-seven".