1027661243 has 8 divisors (see below), whose sum is σ = 1174690560. Its totient is φ = 880687080.

The previous prime is 1027661231. The next prime is 1027661279. The reversal of 1027661243 is 3421667201.

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

It is not a de Polignac number, because 1027661243 - 2⁸ = 1027660987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1027661213) 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, 40298 + ... + 60656.

It is an arithmetic number, because the mean of its divisors is an integer number (146836320).

Almost surely, 2^1027661243 is an apocalyptic number.

1027661243 is a deficient number, since it is larger than the sum of its proper divisors (147029317).

1027661243 is an equidigital number, since it uses as much as digits as its factorization.

1027661243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27577.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 1027661243 is about 32057.1558782123. The cubic root of 1027661243 is about 1009.1366811507.

The spelling of 1027661243 in words is "one billion, twenty-seven million, six hundred sixty-one thousand, two hundred forty-three".