87997953 has 8 divisors (see below), whose sum is σ = 117374400. Its totient is φ = 58643408.

The previous prime is 87997939. The next prime is 87997991. The reversal of 87997953 is 35979978.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87997953 is a prime.

It is a super-3 number, since 3×87997953³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87997893 and 87997902.

It is not an unprimeable number, because it can be changed into a prime (87997913) 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, 10903 + ... + 17171.

It is an arithmetic number, because the mean of its divisors is an integer number (14671800).

Almost surely, 2^87997953 is an apocalyptic number.

It is an amenable number.

87997953 is a deficient number, since it is larger than the sum of its proper divisors (29376447).

87997953 is a wasteful number, since it uses less digits than its factorization.

87997953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10951.

The product of its digits is 4286520, while the sum is 57.

The square root of 87997953 is about 9380.7224135458. The cubic root of 87997953 is about 444.7925692331.

The spelling of 87997953 in words is "eighty-seven million, nine hundred ninety-seven thousand, nine hundred fifty-three".