70109857 has 16 divisors (see below), whose sum is σ = 74000592. Its totient is φ = 66355200.

The previous prime is 70109843. The next prime is 70109861. The reversal of 70109857 is 75890107.

It can be written as a sum of positive squares in 8 ways, for example, as 41977441 + 28132416 = 6479^2 + 5304^2 .

It is a cyclic number.

It is not a de Polignac number, because 70109857 - 2¹¹ = 70107809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (70109657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272673 + ... + 272929.

It is an arithmetic number, because the mean of its divisors is an integer number (4625037).

Almost surely, 2^70109857 is an apocalyptic number.

It is an amenable number.

70109857 is a deficient number, since it is larger than the sum of its proper divisors (3890735).

70109857 is a wasteful number, since it uses less digits than its factorization.

70109857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468.

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 70109857 is about 8373.1629029895. The cubic root of 70109857 is about 412.3440135037.

The spelling of 70109857 in words is "seventy million, one hundred nine thousand, eight hundred fifty-seven".