402020407 has 2 divisors, whose sum is σ = 402020408. Its totient is φ = 402020406.

The previous prime is 402020393. The next prime is 402020419. The reversal of 402020407 is 704020204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402020407 - 2⁷ = 402020279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402020467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201010203 + 201010204.

It is an arithmetic number, because the mean of its divisors is an integer number (201010204).

Almost surely, 2^402020407 is an apocalyptic number.

402020407 is a deficient number, since it is larger than the sum of its proper divisors (1).

402020407 is an equidigital number, since it uses as much as digits as its factorization.

402020407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 402020407 is about 20050.4465536307. The cubic root of 402020407 is about 738.0447574102.

The spelling of 402020407 in words is "four hundred two million, twenty thousand, four hundred seven".