1373870857 has 8 divisors (see below), whose sum is σ = 1389175200. Its totient is φ = 1358644224.

The previous prime is 1373870851. The next prime is 1373870879. The reversal of 1373870857 is 7580783731.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1373870857 is a prime.

It is a super-2 number, since 2×1373870857² = 3775042263427828898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1373870857.

It is not an unprimeable number, because it can be changed into a prime (1373870851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16494 + ... + 54952.

It is an arithmetic number, because the mean of its divisors is an integer number (173646900).

Almost surely, 2^1373870857 is an apocalyptic number.

It is an amenable number.

1373870857 is a deficient number, since it is larger than the sum of its proper divisors (15304343).

1373870857 is a wasteful number, since it uses less digits than its factorization.

1373870857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38855.

The product of its (nonzero) digits is 987840, while the sum is 49.

The square root of 1373870857 is about 37065.7639473409. The cubic root of 1373870857 is about 1111.6855750716.

The spelling of 1373870857 in words is "one billion, three hundred seventy-three million, eight hundred seventy thousand, eight hundred fifty-seven".