1657450129 has 2 divisors, whose sum is σ = 1657450130. Its totient is φ = 1657450128.

The previous prime is 1657450103. The next prime is 1657450153. The reversal of 1657450129 is 9210547561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1630948225 + 26501904 = 40385^2 + 5148^2 .

It is a cyclic number.

It is not a de Polignac number, because 1657450129 - 2¹³ = 1657441937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1657450091 and 1657450100.

It is not a weakly prime, because it can be changed into another prime (1657450189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828725064 + 828725065.

It is an arithmetic number, because the mean of its divisors is an integer number (828725065).

Almost surely, 2^1657450129 is an apocalyptic number.

It is an amenable number.

1657450129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1657450129 is an equidigital number, since it uses as much as digits as its factorization.

1657450129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 1657450129 is about 40711.7934878826. The cubic root of 1657450129 is about 1183.4415778166.

The spelling of 1657450129 in words is "one billion, six hundred fifty-seven million, four hundred fifty thousand, one hundred twenty-nine".