3950991323 has 4 divisors (see below), whose sum is σ = 4078442688. Its totient is φ = 3823539960.

The previous prime is 3950991307. The next prime is 3950991367. The reversal of 3950991323 is 3231990593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3231990593 = 13 ⋅248614661.

It is a cyclic number.

It is not a de Polignac number, because 3950991323 - 2⁴ = 3950991307 is a prime.

It is a super-2 number, since 2×3950991323² = 31220664868842580658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3950991383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63725636 + ... + 63725697.

It is an arithmetic number, because the mean of its divisors is an integer number (1019610672).

Almost surely, 2^3950991323 is an apocalyptic number.

3950991323 is a deficient number, since it is larger than the sum of its proper divisors (127451365).

3950991323 is a wasteful number, since it uses less digits than its factorization.

3950991323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127451364.

The product of its (nonzero) digits is 196830, while the sum is 44.

The square root of 3950991323 is about 62856.9114974638. The cubic root of 3950991323 is about 1580.8913577249.

The spelling of 3950991323 in words is "three billion, nine hundred fifty million, nine hundred ninety-one thousand, three hundred twenty-three".