32400749 has 2 divisors, whose sum is σ = 32400750. Its totient is φ = 32400748.

The previous prime is 32400707. The next prime is 32400769. The reversal of 32400749 is 94700423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32376100 + 24649 = 5690^2 + 157^2 .

It is an emirp because it is prime and its reverse (94700423) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32400749 is a prime.

It is a super-2 number, since 2×32400749² = 2099617071522002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32400769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16200374 + 16200375.

It is an arithmetic number, because the mean of its divisors is an integer number (16200375).

Almost surely, 2^32400749 is an apocalyptic number.

It is an amenable number.

32400749 is a deficient number, since it is larger than the sum of its proper divisors (1).

32400749 is an equidigital number, since it uses as much as digits as its factorization.

32400749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 32400749 is about 5692.1655808664. The cubic root of 32400749 is about 318.8000273138.

The spelling of 32400749 in words is "thirty-two million, four hundred thousand, seven hundred forty-nine".