780431601 has 4 divisors (see below), whose sum is σ = 1040575472. Its totient is φ = 520287732.

The previous prime is 780431579. The next prime is 780431609. The reversal of 780431601 is 106134087.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 106134087 = 3 ⋅35378029.

It is not a de Polignac number, because 780431601 - 2⁶ = 780431537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (780431609) 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, 130071931 + ... + 130071936.

It is an arithmetic number, because the mean of its divisors is an integer number (260143868).

Almost surely, 2^780431601 is an apocalyptic number.

It is an amenable number.

780431601 is a deficient number, since it is larger than the sum of its proper divisors (260143871).

780431601 is a wasteful number, since it uses less digits than its factorization.

780431601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260143870.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 780431601 is about 27936.2059163373. The cubic root of 780431601 is about 920.6861614762.

Adding to 780431601 its reverse (106134087), we get a palindrome (886565688).

The spelling of 780431601 in words is "seven hundred eighty million, four hundred thirty-one thousand, six hundred one".