78961587 has 8 divisors (see below), whose sum is σ = 110823360. Its totient is φ = 49870440.

The previous prime is 78961579. The next prime is 78961607. The reversal of 78961587 is 78516987.

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

It is not a de Polignac number, because 78961587 - 2³ = 78961579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78961517) 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, 692589 + ... + 692702.

It is an arithmetic number, because the mean of its divisors is an integer number (13852920).

Almost surely, 2^78961587 is an apocalyptic number.

78961587 is a deficient number, since it is larger than the sum of its proper divisors (31861773).

78961587 is a wasteful number, since it uses less digits than its factorization.

78961587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385313.

The product of its digits is 846720, while the sum is 51.

The square root of 78961587 is about 8886.0332544955. The cubic root of 78961587 is about 429.0144854135.

The spelling of 78961587 in words is "seventy-eight million, nine hundred sixty-one thousand, five hundred eighty-seven".