1081971662 has 4 divisors (see below), whose sum is σ = 1622957496. Its totient is φ = 540985830.

The previous prime is 1081971661. The next prime is 1081971679. The reversal of 1081971662 is 2661791801.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081971661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270492914 + ... + 270492917.

It is an arithmetic number, because the mean of its divisors is an integer number (405739374).

Almost surely, 2^1081971662 is an apocalyptic number.

1081971662 is a deficient number, since it is larger than the sum of its proper divisors (540985834).

1081971662 is an equidigital number, since it uses as much as digits as its factorization.

1081971662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540985833.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 1081971662 is about 32893.3376536952. The cubic root of 1081971662 is about 1026.6095393008.

The spelling of 1081971662 in words is "one billion, eighty-one million, nine hundred seventy-one thousand, six hundred sixty-two".