1099623457 has 2 divisors, whose sum is σ = 1099623458. Its totient is φ = 1099623456.

The previous prime is 1099623439. The next prime is 1099623463. The reversal of 1099623457 is 7543269901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 773062416 + 326561041 = 27804^2 + 18071^2 .

It is an emirp because it is prime and its reverse (7543269901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1099623457 - 2²³ = 1091234849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1099623407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549811728 + 549811729.

It is an arithmetic number, because the mean of its divisors is an integer number (549811729).

Almost surely, 2^1099623457 is an apocalyptic number.

It is an amenable number.

1099623457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099623457 is an equidigital number, since it uses as much as digits as its factorization.

1099623457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 1099623457 is about 33160.5708183680. The cubic root of 1099623457 is about 1032.1623147861.

It can be divided in two parts, 10996 and 23457, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 1099623457 in words is "one billion, ninety-nine million, six hundred twenty-three thousand, four hundred fifty-seven".