2949621893 has 2 divisors, whose sum is σ = 2949621894. Its totient is φ = 2949621892.

The previous prime is 2949621889. The next prime is 2949621949. The reversal of 2949621893 is 3981269492.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2466413569 + 483208324 = 49663^2 + 21982^2 .

It is a cyclic number.

It is not a de Polignac number, because 2949621893 - 2² = 2949621889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2949621803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1474810946 + 1474810947.

It is an arithmetic number, because the mean of its divisors is an integer number (1474810947).

Almost surely, 2^2949621893 is an apocalyptic number.

It is an amenable number.

2949621893 is a deficient number, since it is larger than the sum of its proper divisors (1).

2949621893 is an equidigital number, since it uses as much as digits as its factorization.

2949621893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 53.

The square root of 2949621893 is about 54310.4215873897. The cubic root of 2949621893 is about 1434.1308650388.

The spelling of 2949621893 in words is "two billion, nine hundred forty-nine million, six hundred twenty-one thousand, eight hundred ninety-three".