49399951 has 2 divisors, whose sum is σ = 49399952. Its totient is φ = 49399950.

The previous prime is 49399949. The next prime is 49399979. The reversal of 49399951 is 15999394.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49399951 - 2¹ = 49399949 is a prime.

Together with 49399949, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 49399895 and 49399904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49399351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24699975 + 24699976.

It is an arithmetic number, because the mean of its divisors is an integer number (24699976).

Almost surely, 2^49399951 is an apocalyptic number.

49399951 is a deficient number, since it is larger than the sum of its proper divisors (1).

49399951 is an equidigital number, since it uses as much as digits as its factorization.

49399951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393660, while the sum is 49.

The square root of 49399951 is about 7028.5098705202. The cubic root of 49399951 is about 366.9234818831.

The spelling of 49399951 in words is "forty-nine million, three hundred ninety-nine thousand, nine hundred fifty-one".