951979421 has 2 divisors, whose sum is σ = 951979422. Its totient is φ = 951979420.

The previous prime is 951979417. The next prime is 951979423. The reversal of 951979421 is 124979159.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 860776921 + 91202500 = 29339^2 + 9550^2 .

It is a cyclic number.

It is not a de Polignac number, because 951979421 - 2² = 951979417 is a prime.

Together with 951979423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (951979423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 475989710 + 475989711.

It is an arithmetic number, because the mean of its divisors is an integer number (475989711).

Almost surely, 2^951979421 is an apocalyptic number.

It is an amenable number.

951979421 is a deficient number, since it is larger than the sum of its proper divisors (1).

951979421 is an equidigital number, since it uses as much as digits as its factorization.

951979421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 47.

The square root of 951979421 is about 30854.1637546701. The cubic root of 951979421 is about 983.7298584924.

The spelling of 951979421 in words is "nine hundred fifty-one million, nine hundred seventy-nine thousand, four hundred twenty-one".