1974048661 has 8 divisors (see below), whose sum is σ = 2129723064. Its totient is φ = 1818920640.

The previous prime is 1974048617. The next prime is 1974048673. The reversal of 1974048661 is 1668404791.

It can be written as a sum of positive squares in 4 ways, for example, as 64883025 + 1909165636 = 8055^2 + 43694^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1974048661 - 2²⁵ = 1940494229 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 (1974049661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129070 + ... + 143551.

It is an arithmetic number, because the mean of its divisors is an integer number (266215383).

Almost surely, 2^1974048661 is an apocalyptic number.

It is an amenable number.

1974048661 is a deficient number, since it is larger than the sum of its proper divisors (155674403).

1974048661 is a wasteful number, since it uses less digits than its factorization.

1974048661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273191.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 1974048661 is about 44430.2673973497. The cubic root of 1974048661 is about 1254.4478687454.

The spelling of 1974048661 in words is "one billion, nine hundred seventy-four million, forty-eight thousand, six hundred sixty-one".