1091427407 has 8 divisors (see below), whose sum is σ = 1264914432. Its totient is φ = 922332600.

The previous prime is 1091427401. The next prime is 1091427439. The reversal of 1091427407 is 7047241901.

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

It is not a de Polignac number, because 1091427407 - 2⁴ = 1091427391 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 (1091427401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1097519 + ... + 1098512.

It is an arithmetic number, because the mean of its divisors is an integer number (158114304).

Almost surely, 2^1091427407 is an apocalyptic number.

1091427407 is a deficient number, since it is larger than the sum of its proper divisors (173487025).

1091427407 is an equidigital number, since it uses as much as digits as its factorization.

1091427407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196109.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 1091427407 is about 33036.7584214917. The cubic root of 1091427407 is about 1029.5915076672.

The spelling of 1091427407 in words is "one billion, ninety-one million, four hundred twenty-seven thousand, four hundred seven".