642369693 has 32 divisors (see below), whose sum is σ = 1021870080. Its totient is φ = 351204480.

The previous prime is 642369677. The next prime is 642369703. The reversal of 642369693 is 396963246.

It is not a de Polignac number, because 642369693 - 2⁴ = 642369677 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642369643) 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, 52396 + ... + 63482.

It is an arithmetic number, because the mean of its divisors is an integer number (31933440).

Almost surely, 2^642369693 is an apocalyptic number.

It is an amenable number.

642369693 is a deficient number, since it is larger than the sum of its proper divisors (379500387).

642369693 is a wasteful number, since it uses less digits than its factorization.

642369693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11217.

The product of its digits is 1259712, while the sum is 48.

The square root of 642369693 is about 25345.0131781382. The cubic root of 642369693 is about 862.8361803117.

The spelling of 642369693 in words is "six hundred forty-two million, three hundred sixty-nine thousand, six hundred ninety-three".