1657909142 has 8 divisors (see below), whose sum is σ = 2511486432. Its totient is φ = 820747000.

The previous prime is 1657909129. The next prime is 1657909157. The reversal of 1657909142 is 2419097561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1657909093 and 1657909102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4103534 + ... + 4103937.

It is an arithmetic number, because the mean of its divisors is an integer number (313935804).

Almost surely, 2^1657909142 is an apocalyptic number.

1657909142 is a deficient number, since it is larger than the sum of its proper divisors (853577290).

1657909142 is a wasteful number, since it uses less digits than its factorization.

1657909142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8207574.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 1657909142 is about 40717.4304444669. The cubic root of 1657909142 is about 1183.5508148752.

The spelling of 1657909142 in words is "one billion, six hundred fifty-seven million, nine hundred nine thousand, one hundred forty-two".