1071977491 has 8 divisors (see below), whose sum is σ = 1204630560. Its totient is φ = 946494912.

The previous prime is 1071977477. The next prime is 1071977527. The reversal of 1071977491 is 1947791701.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1071977491 is a prime.

It is a super-2 number, since 2×1071977491² = 2298271482421310162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1071977441) 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, 1792306 + ... + 1792903.

It is an arithmetic number, because the mean of its divisors is an integer number (150578820).

Almost surely, 2^1071977491 is an apocalyptic number.

1071977491 is a deficient number, since it is larger than the sum of its proper divisors (132653069).

1071977491 is a wasteful number, since it uses less digits than its factorization.

1071977491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585245.

The product of its (nonzero) digits is 111132, while the sum is 46.

The square root of 1071977491 is about 32741.0673466825. The cubic root of 1071977491 is about 1023.4388261651.

The spelling of 1071977491 in words is "one billion, seventy-one million, nine hundred seventy-seven thousand, four hundred ninety-one".