49751389 has 2 divisors, whose sum is σ = 49751390. Its totient is φ = 49751388.

The previous prime is 49751371. The next prime is 49751399. The reversal of 49751389 is 98315794.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39879225 + 9872164 = 6315^2 + 3142^2 .

It is a cyclic number.

It is not a de Polignac number, because 49751389 - 2⁵ = 49751357 is a prime.

It is a super-4 number, since 4×49751389⁴ (a number of 32 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49751399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24875694 + 24875695.

It is an arithmetic number, because the mean of its divisors is an integer number (24875695).

Almost surely, 2^49751389 is an apocalyptic number.

It is an amenable number.

49751389 is a deficient number, since it is larger than the sum of its proper divisors (1).

49751389 is an equidigital number, since it uses as much as digits as its factorization.

49751389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 49751389 is about 7053.4664527451. The cubic root of 49751389 is about 367.7915412203.

The spelling of 49751389 in words is "forty-nine million, seven hundred fifty-one thousand, three hundred eighty-nine".