1097008421 has 4 divisors (see below), whose sum is σ = 1097090112. Its totient is φ = 1096926732.

The previous prime is 1097008399. The next prime is 1097008463. The reversal of 1097008421 is 1248007901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1097008421 - 2⁶ = 1097008357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097008021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15431 + ... + 49316.

It is an arithmetic number, because the mean of its divisors is an integer number (274272528).

Almost surely, 2^1097008421 is an apocalyptic number.

It is an amenable number.

1097008421 is a deficient number, since it is larger than the sum of its proper divisors (81691).

1097008421 is an equidigital number, since it uses as much as digits as its factorization.

1097008421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81690.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 1097008421 is about 33121.1174479364. The cubic root of 1097008421 is about 1031.3434635535.

The spelling of 1097008421 in words is "one billion, ninety-seven million, eight thousand, four hundred twenty-one".