124687649 has 2 divisors, whose sum is σ = 124687650. Its totient is φ = 124687648.

The previous prime is 124687643. The next prime is 124687697. The reversal of 124687649 is 946786421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120846049 + 3841600 = 10993^2 + 1960^2 .

It is a cyclic number.

It is not a de Polignac number, because 124687649 - 2¹² = 124683553 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 (124687643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62343824 + 62343825.

It is an arithmetic number, because the mean of its divisors is an integer number (62343825).

Almost surely, 2^124687649 is an apocalyptic number.

It is an amenable number.

124687649 is a deficient number, since it is larger than the sum of its proper divisors (1).

124687649 is an equidigital number, since it uses as much as digits as its factorization.

124687649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 124687649 is about 11166.3623888892. The cubic root of 124687649 is about 499.5831846264.

The spelling of 124687649 in words is "one hundred twenty-four million, six hundred eighty-seven thousand, six hundred forty-nine".