975661 has 2 divisors, whose sum is σ = 975662. Its totient is φ = 975660.

The previous prime is 975649. The next prime is 975671. The reversal of 975661 is 166579.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 866761 + 108900 = 931^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 975661 - 2⁵ = 975629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (975671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487830 + 487831.

It is an arithmetic number, because the mean of its divisors is an integer number (487831).

2⁹⁷⁵⁶⁶¹ is an apocalyptic number.

It is an amenable number.

975661 is a deficient number, since it is larger than the sum of its proper divisors (1).

975661 is an equidigital number, since it uses as much as digits as its factorization.

975661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 34.

The square root of 975661 is about 987.7555365575. The cubic root of 975661 is about 99.1820274521.

The spelling of 975661 in words is "nine hundred seventy-five thousand, six hundred sixty-one".