1651601123 has 2 divisors, whose sum is σ = 1651601124. Its totient is φ = 1651601122.

The previous prime is 1651601111. The next prime is 1651601141. The reversal of 1651601123 is 3211061561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1651601123 - 2⁶ = 1651601059 is a prime.

It is a super-2 number, since 2×1651601123² = 5455572538989722258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1651601092 and 1651601101.

It is not a weakly prime, because it can be changed into another prime (1651601173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825800561 + 825800562.

It is an arithmetic number, because the mean of its divisors is an integer number (825800562).

Almost surely, 2^1651601123 is an apocalyptic number.

1651601123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1651601123 is an equidigital number, since it uses as much as digits as its factorization.

1651601123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1651601123 is about 40639.8957060670. The cubic root of 1651601123 is about 1182.0478475501.

Adding to 1651601123 its reverse (3211061561), we get a palindrome (4862662684).

The spelling of 1651601123 in words is "one billion, six hundred fifty-one million, six hundred one thousand, one hundred twenty-three".