71749199 has 2 divisors, whose sum is σ = 71749200. Its totient is φ = 71749198.

The previous prime is 71749189. The next prime is 71749201. The reversal of 71749199 is 99194717.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71749199 - 2¹² = 71745103 is a prime.

Together with 71749201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71749109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35874599 + 35874600.

It is an arithmetic number, because the mean of its divisors is an integer number (35874600).

Almost surely, 2^71749199 is an apocalyptic number.

71749199 is a deficient number, since it is larger than the sum of its proper divisors (1).

71749199 is an equidigital number, since it uses as much as digits as its factorization.

71749199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 47.

The square root of 71749199 is about 8470.4898913817. The cubic root of 71749199 is about 415.5331590391.

The spelling of 71749199 in words is "seventy-one million, seven hundred forty-nine thousand, one hundred ninety-nine".