97680421 has 2 divisors, whose sum is σ = 97680422. Its totient is φ = 97680420.

The previous prime is 97680413. The next prime is 97680469. The reversal of 97680421 is 12408679.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73719396 + 23961025 = 8586^2 + 4895^2 .

It is a cyclic number.

It is not a de Polignac number, because 97680421 - 2³ = 97680413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97680221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48840210 + 48840211.

It is an arithmetic number, because the mean of its divisors is an integer number (48840211).

Almost surely, 2^97680421 is an apocalyptic number.

It is an amenable number.

97680421 is a deficient number, since it is larger than the sum of its proper divisors (1).

97680421 is an equidigital number, since it uses as much as digits as its factorization.

97680421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 97680421 is about 9883.3405789743. The cubic root of 97680421 is about 460.5419274654.

The spelling of 97680421 in words is "ninety-seven million, six hundred eighty thousand, four hundred twenty-one".