402426497 has 4 divisors (see below), whose sum is σ = 439010736. Its totient is φ = 365842260.

The previous prime is 402426491. The next prime is 402426503. The reversal of 402426497 is 794624204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (402426491) and next prime (402426503).

It is a cyclic number.

It is not a de Polignac number, because 402426497 - 2¹² = 402422401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402426497.

It is not an unprimeable number, because it can be changed into a prime (402426491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18292103 + ... + 18292124.

It is an arithmetic number, because the mean of its divisors is an integer number (109752684).

Almost surely, 2^402426497 is an apocalyptic number.

It is an amenable number.

402426497 is a deficient number, since it is larger than the sum of its proper divisors (36584239).

402426497 is a wasteful number, since it uses less digits than its factorization.

402426497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36584238.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 402426497 is about 20060.5707047432. The cubic root of 402426497 is about 738.2931790752.

The spelling of 402426497 in words is "four hundred two million, four hundred twenty-six thousand, four hundred ninety-seven".