77449087 has 2 divisors, whose sum is σ = 77449088. Its totient is φ = 77449086.

The previous prime is 77449079. The next prime is 77449121. The reversal of 77449087 is 78094477.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77449087 - 2³ = 77449079 is a prime.

It is a super-2 number, since 2×77449087² = 11996722154267138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77449007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38724543 + 38724544.

It is an arithmetic number, because the mean of its divisors is an integer number (38724544).

Almost surely, 2^77449087 is an apocalyptic number.

77449087 is a deficient number, since it is larger than the sum of its proper divisors (1).

77449087 is an equidigital number, since it uses as much as digits as its factorization.

77449087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 77449087 is about 8800.5162916729. The cubic root of 77449087 is about 426.2575661061.

The spelling of 77449087 in words is "seventy-seven million, four hundred forty-nine thousand, eighty-seven".