971656541 has 2 divisors, whose sum is σ = 971656542. Its totient is φ = 971656540.

The previous prime is 971656531. The next prime is 971656627. The reversal of 971656541 is 145656179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612364516 + 359292025 = 24746^2 + 18955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971656541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 971656492 and 971656501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971656531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485828270 + 485828271.

It is an arithmetic number, because the mean of its divisors is an integer number (485828271).

Almost surely, 2^971656541 is an apocalyptic number.

It is an amenable number.

971656541 is a deficient number, since it is larger than the sum of its proper divisors (1).

971656541 is an equidigital number, since it uses as much as digits as its factorization.

971656541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 44.

The square root of 971656541 is about 31171.4058232862. The cubic root of 971656541 is about 990.4614863727.

The spelling of 971656541 in words is "nine hundred seventy-one million, six hundred fifty-six thousand, five hundred forty-one".