71619091 has 2 divisors, whose sum is σ = 71619092. Its totient is φ = 71619090.

The previous prime is 71619073. The next prime is 71619137. The reversal of 71619091 is 19091617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71619091 - 2¹¹ = 71617043 is a prime.

It is not a weakly prime, because it can be changed into another prime (71619071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35809545 + 35809546.

It is an arithmetic number, because the mean of its divisors is an integer number (35809546).

Almost surely, 2^71619091 is an apocalyptic number.

71619091 is a deficient number, since it is larger than the sum of its proper divisors (1).

71619091 is an equidigital number, since it uses as much as digits as its factorization.

71619091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 34.

The square root of 71619091 is about 8462.8063312355. The cubic root of 71619091 is about 415.2818349757.

The spelling of 71619091 in words is "seventy-one million, six hundred nineteen thousand, ninety-one".