791621949 has 32 divisors (see below), whose sum is σ = 1150640640. Its totient is φ = 482227200.

The previous prime is 791621899. The next prime is 791622011. The reversal of 791621949 is 949126197.

It is a de Polignac number, because none of the positive numbers 2^k-791621949 is a prime.

It is a super-4 number, since 4×791621949⁴ (a number of 37 digits) contains 4444 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 791621898 and 791621907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791621449) 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, 244159 + ... + 247379.

It is an arithmetic number, because the mean of its divisors is an integer number (35957520).

Almost surely, 2^791621949 is an apocalyptic number.

791621949 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

791621949 is a deficient number, since it is larger than the sum of its proper divisors (359018691).

791621949 is a wasteful number, since it uses less digits than its factorization.

791621949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381.

The product of its digits is 244944, while the sum is 48.

The square root of 791621949 is about 28135.7770285450. Note that the first 3 decimals coincide. The cubic root of 791621949 is about 925.0657655700.

The spelling of 791621949 in words is "seven hundred ninety-one million, six hundred twenty-one thousand, nine hundred forty-nine".