49019881 has 2 divisors, whose sum is σ = 49019882. Its totient is φ = 49019880.

The previous prime is 49019837. The next prime is 49019903. The reversal of 49019881 is 18891094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49000000 + 19881 = 7000^2 + 141^2 .

It is a cyclic number.

It is not a de Polignac number, because 49019881 - 2²³ = 40631273 is a prime.

It is a super-2 number, since 2×49019881² = 4805897466508322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49019801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24509940 + 24509941.

It is an arithmetic number, because the mean of its divisors is an integer number (24509941).

Almost surely, 2^49019881 is an apocalyptic number.

It is an amenable number.

49019881 is a deficient number, since it is larger than the sum of its proper divisors (1).

49019881 is an equidigital number, since it uses as much as digits as its factorization.

49019881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 49019881 is about 7001.4199274147. The cubic root of 49019881 is about 365.9800545532.

The spelling of 49019881 in words is "forty-nine million, nineteen thousand, eight hundred eighty-one".