1423440397 has 2 divisors, whose sum is σ = 1423440398. Its totient is φ = 1423440396.

The previous prime is 1423440383. The next prime is 1423440409. The reversal of 1423440397 is 7930443241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1411805476 + 11634921 = 37574^2 + 3411^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423440397 - 2¹⁹ = 1422916109 is a prime.

It is a super-3 number, since 3×1423440397³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1423440197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711720198 + 711720199.

It is an arithmetic number, because the mean of its divisors is an integer number (711720199).

Almost surely, 2^1423440397 is an apocalyptic number.

It is an amenable number.

1423440397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423440397 is an equidigital number, since it uses as much as digits as its factorization.

1423440397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 1423440397 is about 37728.5090747037. The cubic root of 1423440397 is about 1124.8978730667.

The spelling of 1423440397 in words is "one billion, four hundred twenty-three million, four hundred forty thousand, three hundred ninety-seven".