1097461891 has 8 divisors (see below), whose sum is σ = 1139811840. Its totient is φ = 1055903688.

The previous prime is 1097461889. The next prime is 1097461903. The reversal of 1097461891 is 1981647901.

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

It is a cyclic number.

It is not a de Polignac number, because 1097461891 - 2¹ = 1097461889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1097461091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195111 + ... + 200656.

It is an arithmetic number, because the mean of its divisors is an integer number (142476480).

Almost surely, 2^1097461891 is an apocalyptic number.

1097461891 is a deficient number, since it is larger than the sum of its proper divisors (42349949).

1097461891 is an equidigital number, since it uses as much as digits as its factorization.

1097461891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395873.

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 1097461891 is about 33127.9623731977. The cubic root of 1097461891 is about 1031.4855526764.

The spelling of 1097461891 in words is "one billion, ninety-seven million, four hundred sixty-one thousand, eight hundred ninety-one".