971029421 has 2 divisors, whose sum is σ = 971029422. Its totient is φ = 971029420.

The previous prime is 971029403. The next prime is 971029439. The reversal of 971029421 is 124920179.

It is a balanced prime because it is at equal distance from previous prime (971029403) and next prime (971029439).

It can be written as a sum of positive squares in only one way, i.e., 936054025 + 34975396 = 30595^2 + 5914^2 .

It is an emirp because it is prime and its reverse (124920179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971029421 - 2¹⁰ = 971028397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971029471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485514710 + 485514711.

It is an arithmetic number, because the mean of its divisors is an integer number (485514711).

Almost surely, 2^971029421 is an apocalyptic number.

It is an amenable number.

971029421 is a deficient number, since it is larger than the sum of its proper divisors (1).

971029421 is an equidigital number, since it uses as much as digits as its factorization.

971029421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 971029421 is about 31161.3449806006. The cubic root of 971029421 is about 990.2483548599.

The spelling of 971029421 in words is "nine hundred seventy-one million, twenty-nine thousand, four hundred twenty-one".