71379449 has 2 divisors, whose sum is σ = 71379450. Its totient is φ = 71379448.

The previous prime is 71379443. The next prime is 71379457. The reversal of 71379449 is 94497317.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63313849 + 8065600 = 7957^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 71379449 - 2⁴ = 71379433 is a prime.

It is not a weakly prime, because it can be changed into another prime (71379443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35689724 + 35689725.

It is an arithmetic number, because the mean of its divisors is an integer number (35689725).

Almost surely, 2^71379449 is an apocalyptic number.

It is an amenable number.

71379449 is a deficient number, since it is larger than the sum of its proper divisors (1).

71379449 is an equidigital number, since it uses as much as digits as its factorization.

71379449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 71379449 is about 8448.6359254024. The cubic root of 71379449 is about 414.8181309836.

The spelling of 71379449 in words is "seventy-one million, three hundred seventy-nine thousand, four hundred forty-nine".