1992155017 has 4 divisors (see below), whose sum is σ = 1992261700. Its totient is φ = 1992048336.

The previous prime is 1992154993. The next prime is 1992155059. The reversal of 1992155017 is 7105512991.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1338023241 + 654131776 = 36579^2 + 25576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1992155017 is a prime.

It is a super-2 number, since 2×1992155017² = 7937363223516540578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1992155717) 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, 17142 + ... + 65407.

It is an arithmetic number, because the mean of its divisors is an integer number (498065425).

Almost surely, 2^1992155017 is an apocalyptic number.

It is an amenable number.

1992155017 is a deficient number, since it is larger than the sum of its proper divisors (106683).

1992155017 is an equidigital number, since it uses as much as digits as its factorization.

1992155017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106682.

The product of its (nonzero) digits is 28350, while the sum is 40.

The square root of 1992155017 is about 44633.5637945258. The cubic root of 1992155017 is about 1258.2715480893.

The spelling of 1992155017 in words is "one billion, nine hundred ninety-two million, one hundred fifty-five thousand, seventeen".