971920550 has 12 divisors (see below), whose sum is σ = 1807772316. Its totient is φ = 388768200.

The previous prime is 971920541. The next prime is 971920553. The reversal of 971920550 is 55029179.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971920553) 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 5 ways as a sum of consecutive naturals, for example, 9719156 + ... + 9719255.

It is an arithmetic number, because the mean of its divisors is an integer number (150647693).

Almost surely, 2^971920550 is an apocalyptic number.

971920550 is a deficient number, since it is larger than the sum of its proper divisors (835851766).

971920550 is a wasteful number, since it uses less digits than its factorization.

971920550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19438423 (or 19438418 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 971920550 is about 31175.6403302322. The cubic root of 971920550 is about 990.5511844145.

The spelling of 971920550 in words is "nine hundred seventy-one million, nine hundred twenty thousand, five hundred fifty".