780745487 has 4 divisors (see below), whose sum is σ = 784096560. Its totient is φ = 777394416.

The previous prime is 780745477. The next prime is 780745499. The reversal of 780745487 is 784547087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784547087 = 12143 ⋅64609.

It is a cyclic number.

It is not a de Polignac number, because 780745487 - 2⁶ = 780745423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780745477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1675187 + ... + 1675652.

It is an arithmetic number, because the mean of its divisors is an integer number (196024140).

Almost surely, 2^780745487 is an apocalyptic number.

780745487 is a deficient number, since it is larger than the sum of its proper divisors (3351073).

780745487 is a wasteful number, since it uses less digits than its factorization.

780745487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351072.

The product of its (nonzero) digits is 1756160, while the sum is 50.

The square root of 780745487 is about 27941.8232583344. The cubic root of 780745487 is about 920.8095768450.

The spelling of 780745487 in words is "seven hundred eighty million, seven hundred forty-five thousand, four hundred eighty-seven".