1692720085 has 8 divisors (see below), whose sum is σ = 2321444736. Its totient is φ = 1160722320.

The previous prime is 1692720083. The next prime is 1692720097. The reversal of 1692720085 is 5800272961.

1692720085 = 3963² + 3964² + ... + 4067².

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

It is not a de Polignac number, because 1692720085 - 2¹ = 1692720083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1692720083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24181681 + ... + 24181750.

It is an arithmetic number, because the mean of its divisors is an integer number (290180592).

Almost surely, 2^1692720085 is an apocalyptic number.

It is an amenable number.

1692720085 is a deficient number, since it is larger than the sum of its proper divisors (628724651).

1692720085 is an equidigital number, since it uses as much as digits as its factorization.

1692720085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48363443.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 1692720085 is about 41142.6796040316. The cubic root of 1692720085 is about 1191.7771354603. Note that the first 3 decimals are identical.

The spelling of 1692720085 in words is "one billion, six hundred ninety-two million, seven hundred twenty thousand, eighty-five".