87404437 has 2 divisors, whose sum is σ = 87404438. Its totient is φ = 87404436.

The previous prime is 87404431. The next prime is 87404441. The reversal of 87404437 is 73440478.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81830116 + 5574321 = 9046^2 + 2361^2 .

It is a cyclic number.

It is not a de Polignac number, because 87404437 - 2⁷ = 87404309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87404396 and 87404405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87404431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43702218 + 43702219.

It is an arithmetic number, because the mean of its divisors is an integer number (43702219).

Almost surely, 2^87404437 is an apocalyptic number.

It is an amenable number.

87404437 is a deficient number, since it is larger than the sum of its proper divisors (1).

87404437 is an equidigital number, since it uses as much as digits as its factorization.

87404437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 87404437 is about 9349.0340142712. The cubic root of 87404437 is about 443.7903214832.

The spelling of 87404437 in words is "eighty-seven million, four hundred four thousand, four hundred thirty-seven".