71920097 has 2 divisors, whose sum is σ = 71920098. Its totient is φ = 71920096.

The previous prime is 71920091. The next prime is 71920117. The reversal of 71920097 is 79002917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39929761 + 31990336 = 6319^2 + 5656^2 .

It is a cyclic number.

It is not a de Polignac number, because 71920097 - 2⁶ = 71920033 is a prime.

It is not a weakly prime, because it can be changed into another prime (71920091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35960048 + 35960049.

It is an arithmetic number, because the mean of its divisors is an integer number (35960049).

Almost surely, 2^71920097 is an apocalyptic number.

It is an amenable number.

71920097 is a deficient number, since it is larger than the sum of its proper divisors (1).

71920097 is an equidigital number, since it uses as much as digits as its factorization.

71920097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 71920097 is about 8480.5717378016. The cubic root of 71920097 is about 415.8628141859.

The spelling of 71920097 in words is "seventy-one million, nine hundred twenty thousand, ninety-seven".