1097826621 has 16 divisors (see below), whose sum is σ = 1479929664. Its totient is φ = 723844224.

The previous prime is 1097826617. The next prime is 1097826647. The reversal of 1097826621 is 1266287901.

It is not a de Polignac number, because 1097826621 - 2² = 1097826617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097826601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109026 + ... + 118668.

It is an arithmetic number, because the mean of its divisors is an integer number (92495604).

Almost surely, 2^1097826621 is an apocalyptic number.

It is an amenable number.

1097826621 is a deficient number, since it is larger than the sum of its proper divisors (382103043).

1097826621 is a wasteful number, since it uses less digits than its factorization.

1097826621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 1097826621 is about 33133.4667820921. The cubic root of 1097826621 is about 1031.5998078378.

It can be divided in two parts, 109782 and 6621, that added together give a triangular number (116403 = T₄₈₂).

The spelling of 1097826621 in words is "one billion, ninety-seven million, eight hundred twenty-six thousand, six hundred twenty-one".