80670749 has 2 divisors, whose sum is σ = 80670750. Its totient is φ = 80670748.

The previous prime is 80670691. The next prime is 80670761. The reversal of 80670749 is 94707608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50310649 + 30360100 = 7093^2 + 5510^2 .

It is a cyclic number.

It is not a de Polignac number, because 80670749 - 2¹² = 80666653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80670449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40335374 + 40335375.

It is an arithmetic number, because the mean of its divisors is an integer number (40335375).

Almost surely, 2^80670749 is an apocalyptic number.

It is an amenable number.

80670749 is a deficient number, since it is larger than the sum of its proper divisors (1).

80670749 is an equidigital number, since it uses as much as digits as its factorization.

80670749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 80670749 is about 8981.6896517303. The cubic root of 80670749 is about 432.0878254367.

The spelling of 80670749 in words is "eighty million, six hundred seventy thousand, seven hundred forty-nine".