1974494857 has 4 divisors (see below), whose sum is σ = 1978952400. Its totient is φ = 1970037316.

The previous prime is 1974494833. The next prime is 1974494887. The reversal of 1974494857 is 7584944791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1974494857 - 2¹⁹ = 1973970569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1974494887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2228107 + ... + 2228992.

It is an arithmetic number, because the mean of its divisors is an integer number (494738100).

Almost surely, 2^1974494857 is an apocalyptic number.

It is an amenable number.

1974494857 is a deficient number, since it is larger than the sum of its proper divisors (4457543).

1974494857 is an equidigital number, since it uses as much as digits as its factorization.

1974494857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4457542.

The product of its digits is 10160640, while the sum is 58.

The square root of 1974494857 is about 44435.2884203535. The cubic root of 1974494857 is about 1254.5423762864.

The spelling of 1974494857 in words is "one billion, nine hundred seventy-four million, four hundred ninety-four thousand, eight hundred fifty-seven".