1897487492 has 6 divisors (see below), whose sum is σ = 3320603118. Its totient is φ = 948743744.

The previous prime is 1897487477. The next prime is 1897487507. The reversal of 1897487492 is 2947847981.

It is an interprime number because it is at equal distance from previous prime (1897487477) and next prime (1897487507).

It can be written as a sum of positive squares in only one way, i.e., 1823802436 + 73685056 = 42706^2 + 8584^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237185933 + ... + 237185940.

It is an arithmetic number, because the mean of its divisors is an integer number (553433853).

Almost surely, 2^1897487492 is an apocalyptic number.

It is an amenable number.

1897487492 is a deficient number, since it is larger than the sum of its proper divisors (1423115626).

1897487492 is a wasteful number, since it uses less digits than its factorization.

1897487492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474371877 (or 474371875 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 59.

The square root of 1897487492 is about 43560.1594579267. The cubic root of 1897487492 is about 1238.0161418290.

The spelling of 1897487492 in words is "one billion, eight hundred ninety-seven million, four hundred eighty-seven thousand, four hundred ninety-two".