690818193 has 32 divisors (see below), whose sum is σ = 1140182400. Its totient is φ = 410453568.

The previous prime is 690818147. The next prime is 690818203. The reversal of 690818193 is 391818096.

It is not a de Polignac number, because 690818193 - 2¹² = 690814097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690818393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23755 + ... + 44112.

It is an arithmetic number, because the mean of its divisors is an integer number (35630700).

Almost surely, 2^690818193 is an apocalyptic number.

It is an amenable number.

690818193 is a deficient number, since it is larger than the sum of its proper divisors (449364207).

690818193 is a wasteful number, since it uses less digits than its factorization.

690818193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67918 (or 67912 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 690818193 is about 26283.4204965792. The cubic root of 690818193 is about 884.0047300341.

The spelling of 690818193 in words is "six hundred ninety million, eight hundred eighteen thousand, one hundred ninety-three".