30878101 has 2 divisors, whose sum is σ = 30878102. Its totient is φ = 30878100.

The previous prime is 30878093. The next prime is 30878117. The reversal of 30878101 is 10187803.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19140625 + 11737476 = 4375^2 + 3426^2 .

It is a cyclic number.

It is not a de Polignac number, because 30878101 - 2³ = 30878093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30878101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30878161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15439050 + 15439051.

It is an arithmetic number, because the mean of its divisors is an integer number (15439051).

Almost surely, 2^30878101 is an apocalyptic number.

It is an amenable number.

30878101 is a deficient number, since it is larger than the sum of its proper divisors (1).

30878101 is an equidigital number, since it uses as much as digits as its factorization.

30878101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 30878101 is about 5556.8067268891. The cubic root of 30878101 is about 313.7257704182.

The spelling of 30878101 in words is "thirty million, eight hundred seventy-eight thousand, one hundred one".