405140537 has 2 divisors, whose sum is σ = 405140538. Its totient is φ = 405140536.

The previous prime is 405140479. The next prime is 405140543. The reversal of 405140537 is 735041504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 349727401 + 55413136 = 18701^2 + 7444^2 .

It is a cyclic number.

It is not a de Polignac number, because 405140537 - 2¹⁰ = 405139513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (405140587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202570268 + 202570269.

It is an arithmetic number, because the mean of its divisors is an integer number (202570269).

Almost surely, 2^405140537 is an apocalyptic number.

It is an amenable number.

405140537 is a deficient number, since it is larger than the sum of its proper divisors (1).

405140537 is an equidigital number, since it uses as much as digits as its factorization.

405140537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 405140537 is about 20128.1031644812. The cubic root of 405140537 is about 739.9491911792.

The spelling of 405140537 in words is "four hundred five million, one hundred forty thousand, five hundred thirty-seven".