87420049 has 2 divisors, whose sum is σ = 87420050. Its totient is φ = 87420048.

The previous prime is 87420017. The next prime is 87420089. The reversal of 87420049 is 94002478.

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., 68558400 + 18861649 = 8280^2 + 4343^2 .

It is a cyclic number.

It is not a de Polignac number, because 87420049 - 2⁵ = 87420017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87419996 and 87420023.

It is not a weakly prime, because it can be changed into another prime (87420089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43710024 + 43710025.

It is an arithmetic number, because the mean of its divisors is an integer number (43710025).

Almost surely, 2^87420049 is an apocalyptic number.

It is an amenable number.

87420049 is a deficient number, since it is larger than the sum of its proper divisors (1).

87420049 is an equidigital number, since it uses as much as digits as its factorization.

87420049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 87420049 is about 9349.8689295626. The cubic root of 87420049 is about 443.8167428803.

The spelling of 87420049 in words is "eighty-seven million, four hundred twenty thousand, forty-nine".