680100157 has 4 divisors (see below), whose sum is σ = 741927456. Its totient is φ = 618272860.

The previous prime is 680100151. The next prime is 680100203. The reversal of 680100157 is 751001086.

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.

It is a cyclic number.

It is not a de Polignac number, because 680100157 - 2²³ = 671711549 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 (680100151) 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, 30913633 + ... + 30913654.

It is an arithmetic number, because the mean of its divisors is an integer number (185481864).

Almost surely, 2^680100157 is an apocalyptic number.

It is an amenable number.

680100157 is a deficient number, since it is larger than the sum of its proper divisors (61827299).

680100157 is a wasteful number, since it uses less digits than its factorization.

680100157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61827298.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 680100157 is about 26078.7299729109. The cubic root of 680100157 is about 879.4091061621.

The spelling of 680100157 in words is "six hundred eighty million, one hundred thousand, one hundred fifty-seven".