974406421 has 2 divisors, whose sum is σ = 974406422. Its totient is φ = 974406420.

The previous prime is 974406413. The next prime is 974406437. The reversal of 974406421 is 124604479.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 881496100 + 92910321 = 29690^2 + 9639^2 .

It is an emirp because it is prime and its reverse (124604479) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 974406421 - 2³ = 974406413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (974406401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487203210 + 487203211.

It is an arithmetic number, because the mean of its divisors is an integer number (487203211).

Almost surely, 2^974406421 is an apocalyptic number.

It is an amenable number.

974406421 is a deficient number, since it is larger than the sum of its proper divisors (1).

974406421 is an equidigital number, since it uses as much as digits as its factorization.

974406421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 974406421 is about 31215.4836739718. The cubic root of 974406421 is about 991.3949728993.

The spelling of 974406421 in words is "nine hundred seventy-four million, four hundred six thousand, four hundred twenty-one".