1790402945 has 4 divisors (see below), whose sum is σ = 2148483540. Its totient is φ = 1432322352.

The previous prime is 1790402903. The next prime is 1790402969. The reversal of 1790402945 is 5492040971.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5492040971 = 66749 ⋅82279.

It can be written as a sum of positive squares in 2 ways, for example, as 1334879296 + 455523649 = 36536^2 + 21343^2 .

It is a cyclic number.

It is not a de Polignac number, because 1790402945 - 2¹⁸ = 1790140801 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179040290 + ... + 179040299.

It is an arithmetic number, because the mean of its divisors is an integer number (537120885).

Almost surely, 2^1790402945 is an apocalyptic number.

It is an amenable number.

1790402945 is a deficient number, since it is larger than the sum of its proper divisors (358080595).

1790402945 is an equidigital number, since it uses as much as digits as its factorization.

1790402945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358080594.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 1790402945 is about 42313.1533332131. The cubic root of 1790402945 is about 1214.2746482004.

The spelling of 1790402945 in words is "one billion, seven hundred ninety million, four hundred two thousand, nine hundred forty-five".