2430978391 has 4 divisors (see below), whose sum is σ = 2434944712. Its totient is φ = 2427012072.

The previous prime is 2430978373. The next prime is 2430978413. The reversal of 2430978391 is 1938790342.

2430978391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1938790342 = 2 ⋅969395171.

It is a cyclic number.

It is not a de Polignac number, because 2430978391 - 2¹⁵ = 2430945623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2430978311) 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, 1982241 + ... + 1983466.

It is an arithmetic number, because the mean of its divisors is an integer number (608736178).

Almost surely, 2^2430978391 is an apocalyptic number.

2430978391 is a deficient number, since it is larger than the sum of its proper divisors (3966321).

2430978391 is an equidigital number, since it uses as much as digits as its factorization.

2430978391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3966320.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 2430978391 is about 49304.9530067720. The cubic root of 2430978391 is about 1344.6018345742.

The spelling of 2430978391 in words is "two billion, four hundred thirty million, nine hundred seventy-eight thousand, three hundred ninety-one".