1097729426 has 8 divisors (see below), whose sum is σ = 1658440560. Its totient is φ = 544915908.

The previous prime is 1097729419. The next prime is 1097729443. The reversal of 1097729426 is 6249277901.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1974056 + ... + 1974611.

It is an arithmetic number, because the mean of its divisors is an integer number (207305070).

Almost surely, 2^1097729426 is an apocalyptic number.

1097729426 is a deficient number, since it is larger than the sum of its proper divisors (560711134).

1097729426 is a wasteful number, since it uses less digits than its factorization.

1097729426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948808.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 1097729426 is about 33132.0000301823. Note that the first 4 decimals coincide. The cubic root of 1097729426 is about 1031.5693630479.

The spelling of 1097729426 in words is "one billion, ninety-seven million, seven hundred twenty-nine thousand, four hundred twenty-six".