97071421 has 2 divisors, whose sum is σ = 97071422. Its totient is φ = 97071420.

The previous prime is 97071383. The next prime is 97071427. The reversal of 97071421 is 12417079.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66667225 + 30404196 = 8165^2 + 5514^2 .

It is a cyclic number.

It is not a de Polignac number, because 97071421 - 2¹⁹ = 96547133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97071427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48535710 + 48535711.

It is an arithmetic number, because the mean of its divisors is an integer number (48535711).

Almost surely, 2^97071421 is an apocalyptic number.

It is an amenable number.

97071421 is a deficient number, since it is larger than the sum of its proper divisors (1).

97071421 is an equidigital number, since it uses as much as digits as its factorization.

97071421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 97071421 is about 9852.4829865369. The cubic root of 97071421 is about 459.5828306724.

The spelling of 97071421 in words is "ninety-seven million, seventy-one thousand, four hundred twenty-one".