1905485997 has 8 divisors (see below), whose sum is σ = 2544541344. Its totient is φ = 1268377328.

The previous prime is 1905485971. The next prime is 1905486017. The reversal of 1905485997 is 7995845091.

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

It is a cyclic number.

It is not a de Polignac number, because 1905485997 - 2⁸ = 1905485741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1905485917) 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, 484383 + ... + 488300.

It is an arithmetic number, because the mean of its divisors is an integer number (318067668).

Almost surely, 2^1905485997 is an apocalyptic number.

It is an amenable number.

1905485997 is a deficient number, since it is larger than the sum of its proper divisors (639055347).

1905485997 is an equidigital number, since it uses as much as digits as its factorization.

1905485997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973339.

The product of its (nonzero) digits is 4082400, while the sum is 57.

The square root of 1905485997 is about 43651.8727776942. The cubic root of 1905485997 is about 1239.7532454284.

The spelling of 1905485997 in words is "one billion, nine hundred five million, four hundred eighty-five thousand, nine hundred ninety-seven".