1491023411 has 2 divisors, whose sum is σ = 1491023412. Its totient is φ = 1491023410.

The previous prime is 1491023363. The next prime is 1491023431. The reversal of 1491023411 is 1143201941.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1491023411 - 2¹⁰ = 1491022387 is a prime.

It is not a weakly prime, because it can be changed into another prime (1491023431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745511705 + 745511706.

It is an arithmetic number, because the mean of its divisors is an integer number (745511706).

Almost surely, 2^1491023411 is an apocalyptic number.

1491023411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491023411 is an equidigital number, since it uses as much as digits as its factorization.

1491023411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1491023411 is about 38613.7722969409. The cubic root of 1491023411 is about 1142.4261991090.

The spelling of 1491023411 in words is "one billion, four hundred ninety-one million, twenty-three thousand, four hundred eleven".