87449407 has 2 divisors, whose sum is σ = 87449408. Its totient is φ = 87449406.

The previous prime is 87449399. The next prime is 87449423. The reversal of 87449407 is 70494478.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87449407 - 2³ = 87449399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87449447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43724703 + 43724704.

It is an arithmetic number, because the mean of its divisors is an integer number (43724704).

Almost surely, 2^87449407 is an apocalyptic number.

87449407 is a deficient number, since it is larger than the sum of its proper divisors (1).

87449407 is an equidigital number, since it uses as much as digits as its factorization.

87449407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 87449407 is about 9351.4387663076. The cubic root of 87449407 is about 443.8664191800.

The spelling of 87449407 in words is "eighty-seven million, four hundred forty-nine thousand, four hundred seven".