101078491 has 4 divisors (see below), whose sum is σ = 105473232. Its totient is φ = 96683752.

The previous prime is 101078459. The next prime is 101078563. The reversal of 101078491 is 194870101.

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

It is a cyclic number.

It is not a de Polignac number, because 101078491 - 2⁵ = 101078459 is a prime.

It is a super-2 number, since 2×101078491² = 20433722685674162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101078401) 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, 2197336 + ... + 2197381.

It is an arithmetic number, because the mean of its divisors is an integer number (26368308).

Almost surely, 2^101078491 is an apocalyptic number.

101078491 is a deficient number, since it is larger than the sum of its proper divisors (4394741).

101078491 is an equidigital number, since it uses as much as digits as its factorization.

101078491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4394740.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 101078491 is about 10053.7799359246. The cubic root of 101078491 is about 465.8215576068.

The spelling of 101078491 in words is "one hundred one million, seventy-eight thousand, four hundred ninety-one".