2145623629 has 2 divisors, whose sum is σ = 2145623630. Its totient is φ = 2145623628.

The previous prime is 2145623587. The next prime is 2145623639. The reversal of 2145623629 is 9263265412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1870130025 + 275493604 = 43245^2 + 16598^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145623629 - 2²³ = 2137235021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2145623591 and 2145623600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145623639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072811814 + 1072811815.

It is an arithmetic number, because the mean of its divisors is an integer number (1072811815).

Almost surely, 2^2145623629 is an apocalyptic number.

It is an amenable number.

2145623629 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145623629 is an equidigital number, since it uses as much as digits as its factorization.

2145623629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 2145623629 is about 46320.8768159671. The cubic root of 2145623629 is about 1289.7865618470.

The spelling of 2145623629 in words is "two billion, one hundred forty-five million, six hundred twenty-three thousand, six hundred twenty-nine".