49142981 has 2 divisors, whose sum is σ = 49142982. Its totient is φ = 49142980.

The previous prime is 49142957. The next prime is 49143037. The reversal of 49142981 is 18924194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49126081 + 16900 = 7009^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 49142981 - 2²² = 44948677 is a prime.

It is a super-2 number, since 2×49142981² = 4830065163132722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49142921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24571490 + 24571491.

It is an arithmetic number, because the mean of its divisors is an integer number (24571491).

Almost surely, 2^49142981 is an apocalyptic number.

It is an amenable number.

49142981 is a deficient number, since it is larger than the sum of its proper divisors (1).

49142981 is an equidigital number, since it uses as much as digits as its factorization.

49142981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 49142981 is about 7010.2054891422. The cubic root of 49142981 is about 366.2861513469.

The spelling of 49142981 in words is "forty-nine million, one hundred forty-two thousand, nine hundred eighty-one".