1657119901 has 2 divisors, whose sum is σ = 1657119902. Its totient is φ = 1657119900.

The previous prime is 1657119899. The next prime is 1657119917. The reversal of 1657119901 is 1099117561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1546848900 + 110271001 = 39330^2 + 10501^2 .

It is a cyclic number.

It is not a de Polignac number, because 1657119901 - 2¹ = 1657119899 is a prime.

Together with 1657119899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1657119991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828559950 + 828559951.

It is an arithmetic number, because the mean of its divisors is an integer number (828559951).

Almost surely, 2^1657119901 is an apocalyptic number.

It is an amenable number.

1657119901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1657119901 is an equidigital number, since it uses as much as digits as its factorization.

1657119901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17010, while the sum is 40.

The square root of 1657119901 is about 40707.7376060129. The cubic root of 1657119901 is about 1183.3629768588.

The spelling of 1657119901 in words is "one billion, six hundred fifty-seven million, one hundred nineteen thousand, nine hundred one".