79294421 has 2 divisors, whose sum is σ = 79294422. Its totient is φ = 79294420.

The previous prime is 79294417. The next prime is 79294459. The reversal of 79294421 is 12449297.

It is an a-pointer prime, because the next prime (79294459) can be obtained adding 79294421 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64625521 + 14668900 = 8039^2 + 3830^2 .

It is a cyclic number.

It is not a de Polignac number, because 79294421 - 2² = 79294417 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79294921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39647210 + 39647211.

It is an arithmetic number, because the mean of its divisors is an integer number (39647211).

Almost surely, 2^79294421 is an apocalyptic number.

It is an amenable number.

79294421 is a deficient number, since it is larger than the sum of its proper divisors (1).

79294421 is an equidigital number, since it uses as much as digits as its factorization.

79294421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 79294421 is about 8904.7414897907. The cubic root of 79294421 is about 429.6164255626.

The spelling of 79294421 in words is "seventy-nine million, two hundred ninety-four thousand, four hundred twenty-one".