780479101 has 4 divisors (see below), whose sum is σ = 788056672. Its totient is φ = 772901532.

The previous prime is 780479087. The next prime is 780479107. The reversal of 780479101 is 101974087.

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: 101974087 = 4019 ⋅25373.

It is a cyclic number.

It is not a de Polignac number, because 780479101 - 2¹⁵ = 780446333 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 (780479107) 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, 3788631 + ... + 3788836.

It is an arithmetic number, because the mean of its divisors is an integer number (197014168).

Almost surely, 2^780479101 is an apocalyptic number.

It is an amenable number.

780479101 is a deficient number, since it is larger than the sum of its proper divisors (7577571).

780479101 is a wasteful number, since it uses less digits than its factorization.

780479101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7577570.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 780479101 is about 27937.0560546383. The cubic root of 780479101 is about 920.7048399038.

The spelling of 780479101 in words is "seven hundred eighty million, four hundred seventy-nine thousand, one hundred one".