107978155 has 4 divisors (see below), whose sum is σ = 129573792. Its totient is φ = 86382520.

The previous prime is 107978153. The next prime is 107978183. The reversal of 107978155 is 551879701.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 107978155 - 2¹ = 107978153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (107978153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10797811 + ... + 10797820.

It is an arithmetic number, because the mean of its divisors is an integer number (32393448).

Almost surely, 2^107978155 is an apocalyptic number.

107978155 is a deficient number, since it is larger than the sum of its proper divisors (21595637).

107978155 is an equidigital number, since it uses as much as digits as its factorization.

107978155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21595636.

The product of its (nonzero) digits is 88200, while the sum is 43.

The square root of 107978155 is about 10391.2537742084. The cubic root of 107978155 is about 476.1882052995.

The spelling of 107978155 in words is "one hundred seven million, nine hundred seventy-eight thousand, one hundred fifty-five".