139520449 has 2 divisors, whose sum is σ = 139520450. Its totient is φ = 139520448.

The previous prime is 139520413. The next prime is 139520483. The reversal of 139520449 is 944025931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79566400 + 59954049 = 8920^2 + 7743^2 .

It is a cyclic number.

It is not a de Polignac number, because 139520449 - 2⁷ = 139520321 is a prime.

It is not a weakly prime, because it can be changed into another prime (139520149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69760224 + 69760225.

It is an arithmetic number, because the mean of its divisors is an integer number (69760225).

Almost surely, 2^139520449 is an apocalyptic number.

It is an amenable number.

139520449 is a deficient number, since it is larger than the sum of its proper divisors (1).

139520449 is an equidigital number, since it uses as much as digits as its factorization.

139520449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 139520449 is about 11811.8774544947. The cubic root of 139520449 is about 518.6558591639.

The spelling of 139520449 in words is "one hundred thirty-nine million, five hundred twenty thousand, four hundred forty-nine".