4950129391 has 4 divisors (see below), whose sum is σ = 5165352432. Its totient is φ = 4734906352.

The previous prime is 4950129329. The next prime is 4950129407. The reversal of 4950129391 is 1939210594.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1939210594 = 2 ⋅969605297.

It is a cyclic number.

It is not a de Polignac number, because 4950129391 - 2³¹ = 2802645743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4950123391) 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, 107611486 + ... + 107611531.

It is an arithmetic number, because the mean of its divisors is an integer number (1291338108).

Almost surely, 2^4950129391 is an apocalyptic number.

4950129391 is a deficient number, since it is larger than the sum of its proper divisors (215223041).

4950129391 is a wasteful number, since it uses less digits than its factorization.

4950129391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215223040.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 4950129391 is about 70357.1559331387. The cubic root of 4950129391 is about 1704.2717702585.

The spelling of 4950129391 in words is "four billion, nine hundred fifty million, one hundred twenty-nine thousand, three hundred ninety-one".