1491546233 has 2 divisors, whose sum is σ = 1491546234. Its totient is φ = 1491546232.

The previous prime is 1491546229. The next prime is 1491546317. The reversal of 1491546233 is 3326451941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1238195344 + 253350889 = 35188^2 + 15917^2 .

It is a cyclic number.

It is not a de Polignac number, because 1491546233 - 2² = 1491546229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1491543233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745773116 + 745773117.

It is an arithmetic number, because the mean of its divisors is an integer number (745773117).

Almost surely, 2^1491546233 is an apocalyptic number.

It is an amenable number.

1491546233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491546233 is an equidigital number, since it uses as much as digits as its factorization.

1491546233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 1491546233 is about 38620.5415938203. The cubic root of 1491546233 is about 1142.5597127184.

The spelling of 1491546233 in words is "one billion, four hundred ninety-one million, five hundred forty-six thousand, two hundred thirty-three".