130720649 has 2 divisors, whose sum is σ = 130720650. Its totient is φ = 130720648.

The previous prime is 130720643. The next prime is 130720651. The reversal of 130720649 is 946027031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95199049 + 35521600 = 9757^2 + 5960^2 .

It is a cyclic number.

It is not a de Polignac number, because 130720649 - 2²⁴ = 113943433 is a prime.

Together with 130720651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (130720643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65360324 + 65360325.

It is an arithmetic number, because the mean of its divisors is an integer number (65360325).

Almost surely, 2^130720649 is an apocalyptic number.

It is an amenable number.

130720649 is a deficient number, since it is larger than the sum of its proper divisors (1).

130720649 is an equidigital number, since it uses as much as digits as its factorization.

130720649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 130720649 is about 11433.3131243748. The cubic root of 130720649 is about 507.5140446015.

The spelling of 130720649 in words is "one hundred thirty million, seven hundred twenty thousand, six hundred forty-nine".