975121447 has 4 divisors (see below), whose sum is σ = 977667840. Its totient is φ = 972575056.

The previous prime is 975121429. The next prime is 975121453. The reversal of 975121447 is 744121579.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 975121447 - 2¹⁹ = 974597159 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (975121457) 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, 1272622 + ... + 1273387.

It is an arithmetic number, because the mean of its divisors is an integer number (244416960).

Almost surely, 2^975121447 is an apocalyptic number.

975121447 is a deficient number, since it is larger than the sum of its proper divisors (2546393).

975121447 is a wasteful number, since it uses less digits than its factorization.

975121447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546392.

The product of its digits is 70560, while the sum is 40.

The square root of 975121447 is about 31226.9346398266. The cubic root of 975121447 is about 991.6374110460.

The spelling of 975121447 in words is "nine hundred seventy-five million, one hundred twenty-one thousand, four hundred forty-seven".