974478261 has 4 divisors (see below), whose sum is σ = 1299304352. Its totient is φ = 649652172.

The previous prime is 974478259. The next prime is 974478269. The reversal of 974478261 is 162874479.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 974478261 - 2¹ = 974478259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 974478261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (974478269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162413041 + ... + 162413046.

It is an arithmetic number, because the mean of its divisors is an integer number (324826088).

Almost surely, 2^974478261 is an apocalyptic number.

It is an amenable number.

974478261 is a deficient number, since it is larger than the sum of its proper divisors (324826091).

974478261 is a wasteful number, since it uses less digits than its factorization.

974478261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324826090.

The product of its digits is 677376, while the sum is 48.

The square root of 974478261 is about 31216.6343637491. The cubic root of 974478261 is about 991.4193364718.

The spelling of 974478261 in words is "nine hundred seventy-four million, four hundred seventy-eight thousand, two hundred sixty-one".