1977419451 has 12 divisors (see below), whose sum is σ = 3067018152. Its totient is φ = 1129953888.

The previous prime is 1977419449. The next prime is 1977419489. The reversal of 1977419451 is 1549147791.

It is a happy number.

It is not a de Polignac number, because 1977419451 - 2¹ = 1977419449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1977419451.

It is not an unprimeable number, because it can be changed into a prime (1977419051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6725770 + ... + 6726063.

It is an arithmetic number, because the mean of its divisors is an integer number (255584846).

Almost surely, 2^1977419451 is an apocalyptic number.

1977419451 is a deficient number, since it is larger than the sum of its proper divisors (1089598701).

1977419451 is a wasteful number, since it uses less digits than its factorization.

1977419451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13451850 (or 13451843 counting only the distinct ones).

The product of its digits is 317520, while the sum is 48.

The square root of 1977419451 is about 44468.1847054723. The cubic root of 1977419451 is about 1255.1614742258.

The spelling of 1977419451 in words is "one billion, nine hundred seventy-seven million, four hundred nineteen thousand, four hundred fifty-one".