49978237 has 2 divisors, whose sum is σ = 49978238. Its totient is φ = 49978236.

The previous prime is 49978219. The next prime is 49978259. The reversal of 49978237 is 73287994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43480836 + 6497401 = 6594^2 + 2549^2 .

It is a cyclic number.

It is not a de Polignac number, because 49978237 - 2⁷ = 49978109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49978637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24989118 + 24989119.

It is an arithmetic number, because the mean of its divisors is an integer number (24989119).

Almost surely, 2^49978237 is an apocalyptic number.

It is an amenable number.

49978237 is a deficient number, since it is larger than the sum of its proper divisors (1).

49978237 is an equidigital number, since it uses as much as digits as its factorization.

49978237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 49.

The square root of 49978237 is about 7069.5287678883. The cubic root of 49978237 is about 368.3496917222.

The spelling of 49978237 in words is "forty-nine million, nine hundred seventy-eight thousand, two hundred thirty-seven".