1974370421 has 2 divisors, whose sum is σ = 1974370422. Its totient is φ = 1974370420.

The previous prime is 1974370379. The next prime is 1974370459. The reversal of 1974370421 is 1240734791.

It is a happy number.

It is an a-pointer prime, because the next prime (1974370459) can be obtained adding 1974370421 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1891815025 + 82555396 = 43495^2 + 9086^2 .

It is a cyclic number.

It is not a de Polignac number, because 1974370421 - 2¹⁸ = 1974108277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1974370471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987185210 + 987185211.

It is an arithmetic number, because the mean of its divisors is an integer number (987185211).

Almost surely, 2^1974370421 is an apocalyptic number.

It is an amenable number.

1974370421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1974370421 is an equidigital number, since it uses as much as digits as its factorization.

1974370421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 1974370421 is about 44433.8882048375. Note that the first 3 decimals coincide. The cubic root of 1974370421 is about 1254.5160212731.

It can be divided in two parts, 1974370 and 421, that added together give a palindrome (1974791).

The spelling of 1974370421 in words is "one billion, nine hundred seventy-four million, three hundred seventy thousand, four hundred twenty-one".