1821470723 has 2 divisors, whose sum is σ = 1821470724. Its totient is φ = 1821470722.

The previous prime is 1821470713. The next prime is 1821470803. The reversal of 1821470723 is 3270741281.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1821470723 is a prime.

It is a super-2 number, since 2×1821470723² = 6635511189492285458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1821470713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910735361 + 910735362.

It is an arithmetic number, because the mean of its divisors is an integer number (910735362).

Almost surely, 2^1821470723 is an apocalyptic number.

1821470723 is a deficient number, since it is larger than the sum of its proper divisors (1).

1821470723 is an equidigital number, since it uses as much as digits as its factorization.

1821470723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 1821470723 is about 42678.6916739490. The cubic root of 1821470723 is about 1221.2579345668.

The spelling of 1821470723 in words is "one billion, eight hundred twenty-one million, four hundred seventy thousand, seven hundred twenty-three".