1955139933 has 8 divisors (see below), whose sum is σ = 2608631296. Its totient is φ = 1302537600.

The previous prime is 1955139911. The next prime is 1955139983. The reversal of 1955139933 is 3399315591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1955139933 - 2⁶ = 1955139869 is a prime.

It is a super-2 number, since 2×1955139933² = 7645144315222488978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955139983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217108 + ... + 225933.

It is an arithmetic number, because the mean of its divisors is an integer number (326078912).

Almost surely, 2^1955139933 is an apocalyptic number.

It is an amenable number.

1955139933 is a deficient number, since it is larger than the sum of its proper divisors (653491363).

1955139933 is a wasteful number, since it uses less digits than its factorization.

1955139933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444515.

The product of its digits is 492075, while the sum is 48.

The square root of 1955139933 is about 44216.9643123541. The cubic root of 1955139933 is about 1250.4297046395.

The spelling of 1955139933 in words is "one billion, nine hundred fifty-five million, one hundred thirty-nine thousand, nine hundred thirty-three".