1090681731 has 6 divisors (see below), whose sum is σ = 1575429180. Its totient is φ = 727121148.

The previous prime is 1090681727. The next prime is 1090681789. The reversal of 1090681731 is 1371860901.

It is not a de Polignac number, because 1090681731 - 2² = 1090681727 is a prime.

It is a super-2 number, since 2×1090681731² = 2379173276674312722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1090681331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60593421 + ... + 60593438.

It is an arithmetic number, because the mean of its divisors is an integer number (262571530).

Almost surely, 2^1090681731 is an apocalyptic number.

1090681731 is a deficient number, since it is larger than the sum of its proper divisors (484747449).

1090681731 is a wasteful number, since it uses less digits than its factorization.

1090681731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121186865 (or 121186862 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1090681731 is about 33025.4709428950. The cubic root of 1090681731 is about 1029.3569779183.

The spelling of 1090681731 in words is "one billion, ninety million, six hundred eighty-one thousand, seven hundred thirty-one".