2501643973 has 2 divisors, whose sum is σ = 2501643974. Its totient is φ = 2501643972.

The previous prime is 2501643953. The next prime is 2501644009. The reversal of 2501643973 is 3793461052.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1800559489 + 701084484 = 42433^2 + 26478^2 .

It is a cyclic number.

It is not a de Polignac number, because 2501643973 - 2¹³ = 2501635781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2501643913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250821986 + 1250821987.

It is an arithmetic number, because the mean of its divisors is an integer number (1250821987).

Almost surely, 2^2501643973 is an apocalyptic number.

It is an amenable number.

2501643973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2501643973 is an equidigital number, since it uses as much as digits as its factorization.

2501643973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 2501643973 is about 50016.4370282410. The cubic root of 2501643973 is about 1357.5062383962.

The spelling of 2501643973 in words is "two billion, five hundred one million, six hundred forty-three thousand, nine hundred seventy-three".