193254697138 has 4 divisors (see below), whose sum is σ = 289882045710. Its totient is φ = 96627348568.

The previous prime is 193254697121. The next prime is 193254697147. The reversal of 193254697138 is 831796452391.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 189083216569 + 4171480569 = 434837^2 + 64587^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48313674283 + ... + 48313674286.

Almost surely, 2^193254697138 is an apocalyptic number.

193254697138 is a deficient number, since it is larger than the sum of its proper divisors (96627348572).

193254697138 is an equidigital number, since it uses as much as digits as its factorization.

193254697138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96627348571.

The product of its digits is 9797760, while the sum is 58.

The spelling of 193254697138 in words is "one hundred ninety-three billion, two hundred fifty-four million, six hundred ninety-seven thousand, one hundred thirty-eight".