71098949 has 2 divisors, whose sum is σ = 71098950. Its totient is φ = 71098948.

The previous prime is 71098933. The next prime is 71098967. The reversal of 71098949 is 94989017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49773025 + 21325924 = 7055^2 + 4618^2 .

It is a cyclic number.

It is not a de Polignac number, because 71098949 - 2⁴ = 71098933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71098999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35549474 + 35549475.

It is an arithmetic number, because the mean of its divisors is an integer number (35549475).

Almost surely, 2^71098949 is an apocalyptic number.

It is an amenable number.

71098949 is a deficient number, since it is larger than the sum of its proper divisors (1).

71098949 is an equidigital number, since it uses as much as digits as its factorization.

71098949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 71098949 is about 8432.0192717996. The cubic root of 71098949 is about 414.2740470470.

The spelling of 71098949 in words is "seventy-one million, ninety-eight thousand, nine hundred forty-nine".