780654925 has 12 divisors (see below), whose sum is σ = 970512660. Its totient is φ = 622910720.

The previous prime is 780654877. The next prime is 780654949. The reversal of 780654925 is 529456087.

It can be written as a sum of positive squares in 6 ways, for example, as 114447204 + 666207721 = 10698^2 + 25811^2 .

It is not a de Polignac number, because 780654925 - 2¹³ = 780646733 is a prime.

It is a super-2 number, since 2×780654925² = 1218844223853511250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30412 + ... + 49861.

It is an arithmetic number, because the mean of its divisors is an integer number (80876055).

Almost surely, 2^780654925 is an apocalyptic number.

It is an amenable number.

780654925 is a deficient number, since it is larger than the sum of its proper divisors (189857735).

780654925 is a wasteful number, since it uses less digits than its factorization.

780654925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80672 (or 80667 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 780654925 is about 27940.2026656930. The cubic root of 780654925 is about 920.7739725913.

The spelling of 780654925 in words is "seven hundred eighty million, six hundred fifty-four thousand, nine hundred twenty-five".