1420288091 has 2 divisors, whose sum is σ = 1420288092. Its totient is φ = 1420288090.

The previous prime is 1420288027. The next prime is 1420288099. The reversal of 1420288091 is 1908820241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1420288091 - 2⁶ = 1420288027 is a prime.

It is a super-2 number, since 2×1420288091² = 4034436522872848562, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1420288099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710144045 + 710144046.

It is an arithmetic number, because the mean of its divisors is an integer number (710144046).

Almost surely, 2^1420288091 is an apocalyptic number.

1420288091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420288091 is an equidigital number, since it uses as much as digits as its factorization.

1420288091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 1420288091 is about 37686.7097396416. The cubic root of 1420288091 is about 1124.0668715993.

The spelling of 1420288091 in words is "one billion, four hundred twenty million, two hundred eighty-eight thousand, ninety-one".