1992193957 has 4 divisors (see below), whose sum is σ = 2145439660. Its totient is φ = 1838948256.

The previous prime is 1992193927. The next prime is 1992193969. The reversal of 1992193957 is 7593912991.

It is a Cunningham number, because it is equal to 44634²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 294671556 + 1697522401 = 17166^2 + 41201^2 .

It is a cyclic number.

It is not a de Polignac number, because 1992193957 - 2²⁷ = 1857976229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1992193898 and 1992193907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992193927) 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, 76622832 + ... + 76622857.

It is an arithmetic number, because the mean of its divisors is an integer number (536359915).

Almost surely, 2^1992193957 is an apocalyptic number.

It is an amenable number.

1992193957 is a deficient number, since it is larger than the sum of its proper divisors (153245703).

1992193957 is a wasteful number, since it uses less digits than its factorization.

1992193957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153245702.

The product of its digits is 1377810, while the sum is 55.

The square root of 1992193957 is about 44634.0000112022. Note that the first 4 decimals coincide. The cubic root of 1992193957 is about 1258.2797463762.

The spelling of 1992193957 in words is "one billion, nine hundred ninety-two million, one hundred ninety-three thousand, nine hundred fifty-seven".