1027491658 has 4 divisors (see below), whose sum is σ = 1541237490. Its totient is φ = 513745828.

The previous prime is 1027491649. The next prime is 1027491659. The reversal of 1027491658 is 8561947201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 844890489 + 182601169 = 29067^2 + 13513^2 .

It is not an unprimeable number, because it can be changed into a prime (1027491659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256872913 + ... + 256872916.

Almost surely, 2^1027491658 is an apocalyptic number.

1027491658 is a deficient number, since it is larger than the sum of its proper divisors (513745832).

1027491658 is an equidigital number, since it uses as much as digits as its factorization.

1027491658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513745831.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1027491658 is about 32054.5107278211. The cubic root of 1027491658 is about 1009.0811687402.

The spelling of 1027491658 in words is "one billion, twenty-seven million, four hundred ninety-one thousand, six hundred fifty-eight".