2978487451 has 4 divisors (see below), whose sum is σ = 2978597304. Its totient is φ = 2978377600.

The previous prime is 2978487403. The next prime is 2978487509. The reversal of 2978487451 is 1547848792.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2978487451 - 2¹¹ = 2978485403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2978487392 and 2978487401.

It is not an unprimeable number, because it can be changed into a prime (2978287451) 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, 18171 + ... + 79291.

It is an arithmetic number, because the mean of its divisors is an integer number (744649326).

Almost surely, 2^2978487451 is an apocalyptic number.

2978487451 is a deficient number, since it is larger than the sum of its proper divisors (109853).

2978487451 is an equidigital number, since it uses as much as digits as its factorization.

2978487451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109852.

The product of its digits is 4515840, while the sum is 55.

The square root of 2978487451 is about 54575.5206205126. The cubic root of 2978487451 is about 1438.7939121456.

The spelling of 2978487451 in words is "two billion, nine hundred seventy-eight million, four hundred eighty-seven thousand, four hundred fifty-one".