975551 has 2 divisors, whose sum is σ = 975552. Its totient is φ = 975550.

The previous prime is 975523. The next prime is 975553. The reversal of 975551 is 155579.

It is a strong prime.

It is an emirp because it is prime and its reverse (155579) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 975551 - 2¹⁸ = 713407 is a prime.

Together with 975553, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (975553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487775 + 487776.

It is an arithmetic number, because the mean of its divisors is an integer number (487776).

2⁹⁷⁵⁵⁵¹ is an apocalyptic number.

975551 is a deficient number, since it is larger than the sum of its proper divisors (1).

975551 is an equidigital number, since it uses as much as digits as its factorization.

975551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7875, while the sum is 32.

The square root of 975551 is about 987.6998531943. The cubic root of 975551 is about 99.1782999165.

The spelling of 975551 in words is "nine hundred seventy-five thousand, five hundred fifty-one".