75420407 has 2 divisors, whose sum is σ = 75420408. Its totient is φ = 75420406.

The previous prime is 75420391. The next prime is 75420421. The reversal of 75420407 is 70402457.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75420407 - 2⁴ = 75420391 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75420407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75420497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37710203 + 37710204.

It is an arithmetic number, because the mean of its divisors is an integer number (37710204).

Almost surely, 2^75420407 is an apocalyptic number.

75420407 is a deficient number, since it is larger than the sum of its proper divisors (1).

75420407 is an equidigital number, since it uses as much as digits as its factorization.

75420407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 75420407 is about 8684.4923282826. The cubic root of 75420407 is about 422.5028315812.

The spelling of 75420407 in words is "seventy-five million, four hundred twenty thousand, four hundred seven".