97878055 has 8 divisors (see below), whose sum is σ = 128131344. Its totient is φ = 71184000.

The previous prime is 97878043. The next prime is 97878059. The reversal of 97878055 is 55087879.

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

It is not a de Polignac number, because 97878055 - 2⁵ = 97878023 is a prime.

It is a super-2 number, since 2×97878055² = 19160227301166050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97878059) 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, 889746 + ... + 889855.

It is an arithmetic number, because the mean of its divisors is an integer number (16016418).

Almost surely, 2^97878055 is an apocalyptic number.

97878055 is a deficient number, since it is larger than the sum of its proper divisors (30253289).

97878055 is a wasteful number, since it uses less digits than its factorization.

97878055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779617.

The product of its (nonzero) digits is 705600, while the sum is 49.

The square root of 97878055 is about 9893.3338668014. Note that the first 3 decimals coincide. The cubic root of 97878055 is about 460.8523186576.

The spelling of 97878055 in words is "ninety-seven million, eight hundred seventy-eight thousand, fifty-five".