1791478453 has 2 divisors, whose sum is σ = 1791478454. Its totient is φ = 1791478452.

The previous prime is 1791478421. The next prime is 1791478459. The reversal of 1791478453 is 3548741971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1241716644 + 549761809 = 35238^2 + 23447^2 .

It is a cyclic number.

It is not a de Polignac number, because 1791478453 - 2⁵ = 1791478421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1791478397 and 1791478406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1791478459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895739226 + 895739227.

It is an arithmetic number, because the mean of its divisors is an integer number (895739227).

Almost surely, 2^1791478453 is an apocalyptic number.

It is an amenable number.

1791478453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1791478453 is an equidigital number, since it uses as much as digits as its factorization.

1791478453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 49.

The square root of 1791478453 is about 42325.8603338432. The cubic root of 1791478453 is about 1214.5177407193.

The spelling of 1791478453 in words is "one billion, seven hundred ninety-one million, four hundred seventy-eight thousand, four hundred fifty-three".