921976541 has 2 divisors, whose sum is σ = 921976542. Its totient is φ = 921976540.

The previous prime is 921976529. The next prime is 921976547. The reversal of 921976541 is 145679129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 584188900 + 337787641 = 24170^2 + 18379^2 .

It is an emirp because it is prime and its reverse (145679129) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 921976541 - 2⁶ = 921976477 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 921976492 and 921976501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921976547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460988270 + 460988271.

It is an arithmetic number, because the mean of its divisors is an integer number (460988271).

Almost surely, 2^921976541 is an apocalyptic number.

It is an amenable number.

921976541 is a deficient number, since it is larger than the sum of its proper divisors (1).

921976541 is an equidigital number, since it uses as much as digits as its factorization.

921976541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 921976541 is about 30364.0666084107. The cubic root of 921976541 is about 973.2848358767.

The spelling of 921976541 in words is "nine hundred twenty-one million, nine hundred seventy-six thousand, five hundred forty-one".