1693394857 has 16 divisors (see below), whose sum is σ = 2112574464. Its totient is φ = 1318698000.

The previous prime is 1693394851. The next prime is 1693394869. The reversal of 1693394857 is 7584933961.

It is a cyclic number.

It is not a de Polignac number, because 1693394857 - 2¹⁵ = 1693362089 is a prime.

It is a super-2 number, since 2×1693394857² = 5735172283428100898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1693394798 and 1693394807.

It is not an unprimeable number, because it can be changed into a prime (1693394851) 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, 134982 + ... + 146992.

It is an arithmetic number, because the mean of its divisors is an integer number (132035904).

Almost surely, 2^1693394857 is an apocalyptic number.

It is an amenable number.

1693394857 is a deficient number, since it is larger than the sum of its proper divisors (419179607).

1693394857 is a wasteful number, since it uses less digits than its factorization.

1693394857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13860.

The product of its digits is 4898880, while the sum is 55.

The square root of 1693394857 is about 41150.8791765133. The cubic root of 1693394857 is about 1191.9354744980.

The spelling of 1693394857 in words is "one billion, six hundred ninety-three million, three hundred ninety-four thousand, eight hundred fifty-seven".