49007561 has 2 divisors, whose sum is σ = 49007562. Its totient is φ = 49007560.

The previous prime is 49007557. The next prime is 49007579. The reversal of 49007561 is 16570094.

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., 30250000 + 18757561 = 5500^2 + 4331^2 .

It is a cyclic number.

It is not a de Polignac number, because 49007561 - 2² = 49007557 is a prime.

It is not a weakly prime, because it can be changed into another prime (49007501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24503780 + 24503781.

It is an arithmetic number, because the mean of its divisors is an integer number (24503781).

Almost surely, 2^49007561 is an apocalyptic number.

It is an amenable number.

49007561 is a deficient number, since it is larger than the sum of its proper divisors (1).

49007561 is an equidigital number, since it uses as much as digits as its factorization.

49007561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 49007561 is about 7000.5400505961. The cubic root of 49007561 is about 365.9493918101.

The spelling of 49007561 in words is "forty-nine million, seven thousand, five hundred sixty-one".