1897123045 has 8 divisors (see below), whose sum is σ = 2284593696. Its totient is φ = 1512334416.

The previous prime is 1897123043. The next prime is 1897123061. The reversal of 1897123045 is 5403217981.

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 1897123045 - 2¹ = 1897123043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1897122989 and 1897123007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897123043) 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, 668947 + ... + 671776.

It is an arithmetic number, because the mean of its divisors is an integer number (285574212).

Almost surely, 2^1897123045 is an apocalyptic number.

It is an amenable number.

1897123045 is a deficient number, since it is larger than the sum of its proper divisors (387470651).

1897123045 is a wasteful number, since it uses less digits than its factorization.

1897123045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341011.

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

The square root of 1897123045 is about 43555.9759964118. The cubic root of 1897123045 is about 1237.9368755782.

The spelling of 1897123045 in words is "one billion, eight hundred ninety-seven million, one hundred twenty-three thousand, forty-five".