402149149 has 4 divisors (see below), whose sum is σ = 408741820. Its totient is φ = 395556480.

The previous prime is 402149147. The next prime is 402149159. The reversal of 402149149 is 941941204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102616900 + 299532249 = 10130^2 + 17307^2 .

It is a cyclic number.

It is not a de Polignac number, because 402149149 - 2¹ = 402149147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402149141) 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, 3296244 + ... + 3296365.

It is an arithmetic number, because the mean of its divisors is an integer number (102185455).

Almost surely, 2^402149149 is an apocalyptic number.

It is an amenable number.

402149149 is a deficient number, since it is larger than the sum of its proper divisors (6592671).

402149149 is an equidigital number, since it uses as much as digits as its factorization.

402149149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6592670.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 402149149 is about 20053.6567488326. The cubic root of 402149149 is about 738.1235321984.

The spelling of 402149149 in words is "four hundred two million, one hundred forty-nine thousand, one hundred forty-nine".