49158409 has 2 divisors, whose sum is σ = 49158410. Its totient is φ = 49158408.

The previous prime is 49158397. The next prime is 49158443. The reversal of 49158409 is 90485194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38937600 + 10220809 = 6240^2 + 3197^2 .

It is a cyclic number.

It is not a de Polignac number, because 49158409 - 2¹³ = 49150217 is a prime.

It is a super-2 number, since 2×49158409² = 4833098350822562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49158209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24579204 + 24579205.

It is an arithmetic number, because the mean of its divisors is an integer number (24579205).

Almost surely, 2^49158409 is an apocalyptic number.

It is an amenable number.

49158409 is a deficient number, since it is larger than the sum of its proper divisors (1).

49158409 is an equidigital number, since it uses as much as digits as its factorization.

49158409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 49158409 is about 7011.3057984943. The cubic root of 49158409 is about 366.3244780917.

The spelling of 49158409 in words is "forty-nine million, one hundred fifty-eight thousand, four hundred nine".