40899629 has 4 divisors (see below), whose sum is σ = 41078460. Its totient is φ = 40720800.

The previous prime is 40899613. The next prime is 40899631. The reversal of 40899629 is 92699804.

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 21141604 + 19758025 = 4598^2 + 4445^2 .

It is a cyclic number.

It is not a de Polignac number, because 40899629 - 2⁴ = 40899613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40899679) 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, 89072 + ... + 89529.

It is an arithmetic number, because the mean of its divisors is an integer number (10269615).

Almost surely, 2^40899629 is an apocalyptic number.

It is an amenable number.

40899629 is a deficient number, since it is larger than the sum of its proper divisors (178831).

40899629 is a wasteful number, since it uses less digits than its factorization.

40899629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178830.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 40899629 is about 6395.2817764349. The cubic root of 40899629 is about 344.5401111730.

The spelling of 40899629 in words is "forty million, eight hundred ninety-nine thousand, six hundred twenty-nine".