69372421 has 2 divisors, whose sum is σ = 69372422. Its totient is φ = 69372420.

The previous prime is 69372419. The next prime is 69372431. The reversal of 69372421 is 12427396.

69372421 = 5889² + 5890².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34692100 + 34680321 = 5890^2 + 5889^2 .

It is a cyclic number.

It is not a de Polignac number, because 69372421 - 2¹ = 69372419 is a prime.

Together with 69372419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69372431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34686210 + 34686211.

It is an arithmetic number, because the mean of its divisors is an integer number (34686211).

Almost surely, 2^69372421 is an apocalyptic number.

69372421 is the 5890-th centered square number.

It is an amenable number.

69372421 is a deficient number, since it is larger than the sum of its proper divisors (1).

69372421 is an equidigital number, since it uses as much as digits as its factorization.

69372421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 69372421 is about 8329.0108056119. The cubic root of 69372421 is about 410.8931964970.

The spelling of 69372421 in words is "sixty-nine million, three hundred seventy-two thousand, four hundred twenty-one".