71674649 has 2 divisors, whose sum is σ = 71674650. Its totient is φ = 71674648.

The previous prime is 71674639. The next prime is 71674663. The reversal of 71674649 is 94647617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70023424 + 1651225 = 8368^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 71674649 - 2⁴ = 71674633 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (71674619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35837324 + 35837325.

It is an arithmetic number, because the mean of its divisors is an integer number (35837325).

Almost surely, 2^71674649 is an apocalyptic number.

It is an amenable number.

71674649 is a deficient number, since it is larger than the sum of its proper divisors (1).

71674649 is an equidigital number, since it uses as much as digits as its factorization.

71674649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 71674649 is about 8466.0881757752. The cubic root of 71674649 is about 415.3891911959.

The spelling of 71674649 in words is "seventy-one million, six hundred seventy-four thousand, six hundred forty-nine".