4951939 has 4 divisors (see below), whose sum is σ = 5072760. Its totient is φ = 4831120.

The previous prime is 4951907. The next prime is 4951943. The reversal of 4951939 is 9391594.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9391594 = 2 ⋅4695797.

It is a cyclic number.

It is not a de Polignac number, because 4951939 - 2⁵ = 4951907 is a prime.

It is a Duffinian number.

4951939 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4951439) 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, 60349 + ... + 60430.

It is an arithmetic number, because the mean of its divisors is an integer number (1268190).

Almost surely, 2^4951939 is an apocalyptic number.

4951939 is a deficient number, since it is larger than the sum of its proper divisors (120821).

4951939 is a wasteful number, since it uses less digits than its factorization.

4951939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120820.

The product of its digits is 43740, while the sum is 40.

The square root of 4951939 is about 2225.2952613080. The cubic root of 4951939 is about 170.4479420709.

It can be divided in two parts, 495 and 1939, that multiplied together give a triangular number (959805 = T₁₃₈₅).

The spelling of 4951939 in words is "four million, nine hundred fifty-one thousand, nine hundred thirty-nine".