207345421 has 2 divisors, whose sum is σ = 207345422. Its totient is φ = 207345420.

The previous prime is 207345409. The next prime is 207345427. The reversal of 207345421 is 124543702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189612900 + 17732521 = 13770^2 + 4211^2 .

It is a cyclic number.

It is not a de Polignac number, because 207345421 - 2⁹ = 207344909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 207345421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207345427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103672710 + 103672711.

It is an arithmetic number, because the mean of its divisors is an integer number (103672711).

Almost surely, 2^207345421 is an apocalyptic number.

It is an amenable number.

207345421 is a deficient number, since it is larger than the sum of its proper divisors (1).

207345421 is an equidigital number, since it uses as much as digits as its factorization.

207345421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 207345421 is about 14399.4937758242. The cubic root of 207345421 is about 591.8770260228.

The spelling of 207345421 in words is "two hundred seven million, three hundred forty-five thousand, four hundred twenty-one".