42949672949 has 2 divisors, whose sum is σ = 42949672950. Its totient is φ = 42949672948.

The previous prime is 42949672943. The next prime is 42949672979. The reversal of 42949672949 is 94927694924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32011650724 + 10938022225 = 178918^2 + 104585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42949672949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42949672943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21474836474 + 21474836475.

It is an arithmetic number, because the mean of its divisors is an integer number (21474836475).

Almost surely, 2^42949672949 is an apocalyptic number.

It is an amenable number.

42949672949 is a deficient number, since it is larger than the sum of its proper divisors (1).

42949672949 is an equidigital number, since it uses as much as digits as its factorization.

42949672949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70543872, while the sum is 65.

The spelling of 42949672949 in words is "forty-two billion, nine hundred forty-nine million, six hundred seventy-two thousand, nine hundred forty-nine".