425421973 has 2 divisors, whose sum is σ = 425421974. Its totient is φ = 425421972.

The previous prime is 425421947. The next prime is 425421977. The reversal of 425421973 is 379124524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225991089 + 199430884 = 15033^2 + 14122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425421973 is a prime.

It is a super-2 number, since 2×425421973² = 361967710222425458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425421977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212710986 + 212710987.

It is an arithmetic number, because the mean of its divisors is an integer number (212710987).

Almost surely, 2^425421973 is an apocalyptic number.

It is an amenable number.

425421973 is a deficient number, since it is larger than the sum of its proper divisors (1).

425421973 is an equidigital number, since it uses as much as digits as its factorization.

425421973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 425421973 is about 20625.7599375150. The cubic root of 425421973 is about 752.0960465871.

The spelling of 425421973 in words is "four hundred twenty-five million, four hundred twenty-one thousand, nine hundred seventy-three".