1019374821 has 16 divisors (see below), whose sum is σ = 1512603520. Its totient is φ = 678494880.

The previous prime is 1019374819. The next prime is 1019374849. The reversal of 1019374821 is 1284739101.

It is a happy number.

It is not a de Polignac number, because 1019374821 - 2¹ = 1019374819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1019374861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12880 + ... + 46953.

It is an arithmetic number, because the mean of its divisors is an integer number (94537720).

Almost surely, 2^1019374821 is an apocalyptic number.

It is an amenable number.

1019374821 is a deficient number, since it is larger than the sum of its proper divisors (493228699).

1019374821 is an equidigital number, since it uses as much as digits as its factorization.

1019374821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60473 (or 60467 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1019374821 is about 31927.6497882321. The cubic root of 1019374821 is about 1006.4170076003.

The spelling of 1019374821 in words is "one billion, nineteen million, three hundred seventy-four thousand, eight hundred twenty-one".