49390987 has 2 divisors, whose sum is σ = 49390988. Its totient is φ = 49390986.

The previous prime is 49390969. The next prime is 49391003. The reversal of 49390987 is 78909394.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49390987 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49390987.

It is not a weakly prime, because it can be changed into another prime (49390927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24695493 + 24695494.

It is an arithmetic number, because the mean of its divisors is an integer number (24695494).

Almost surely, 2^49390987 is an apocalyptic number.

49390987 is a deficient number, since it is larger than the sum of its proper divisors (1).

49390987 is an equidigital number, since it uses as much as digits as its factorization.

49390987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 49390987 is about 7027.8721530773. The cubic root of 49390987 is about 366.9012868472.

The spelling of 49390987 in words is "forty-nine million, three hundred ninety thousand, nine hundred eighty-seven".