780879481 has 4 divisors (see below), whose sum is σ = 799925364. Its totient is φ = 761833600.

The previous prime is 780879469. The next prime is 780879493. The reversal of 780879481 is 184978087.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (780879469) and next prime (780879493).

It can be written as a sum of positive squares in 2 ways, for example, as 79477225 + 701402256 = 8915^2 + 26484^2 .

It is a cyclic number.

It is not a de Polignac number, because 780879481 - 2¹⁵ = 780846713 is a prime.

It is a super-2 number, since 2×780879481² = 1219545527693658722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780879401) 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, 9522880 + ... + 9522961.

It is an arithmetic number, because the mean of its divisors is an integer number (199981341).

Almost surely, 2^780879481 is an apocalyptic number.

It is an amenable number.

780879481 is a deficient number, since it is larger than the sum of its proper divisors (19045883).

780879481 is a wasteful number, since it uses less digits than its factorization.

780879481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19045882.

The product of its (nonzero) digits is 903168, while the sum is 52.

The square root of 780879481 is about 27944.2208873320. The cubic root of 780879481 is about 920.8622512452.

The spelling of 780879481 in words is "seven hundred eighty million, eight hundred seventy-nine thousand, four hundred eighty-one".