1953938158 has 4 divisors (see below), whose sum is σ = 2930907240. Its totient is φ = 976969078.

The previous prime is 1953938141. The next prime is 1953938167. The reversal of 1953938158 is 8518393591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8518393591 = 661 ⋅12887131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488484538 + ... + 488484541.

It is an arithmetic number, because the mean of its divisors is an integer number (732726810).

Almost surely, 2^1953938158 is an apocalyptic number.

1953938158 is a deficient number, since it is larger than the sum of its proper divisors (976969082).

1953938158 is an equidigital number, since it uses as much as digits as its factorization.

1953938158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976969081.

The product of its digits is 1166400, while the sum is 52.

The square root of 1953938158 is about 44203.3726993767. The cubic root of 1953938158 is about 1250.1734496377.

The spelling of 1953938158 in words is "one billion, nine hundred fifty-three million, nine hundred thirty-eight thousand, one hundred fifty-eight".