400137373 has 2 divisors, whose sum is σ = 400137374. Its totient is φ = 400137372.

The previous prime is 400137349. The next prime is 400137377. The reversal of 400137373 is 373731004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201270969 + 198866404 = 14187^2 + 14102^2 .

It is a cyclic number.

It is not a de Polignac number, because 400137373 - 2⁵ = 400137341 is a prime.

It is a super-2 number, since 2×400137373² = 320219834542682258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400137377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200068686 + 200068687.

It is an arithmetic number, because the mean of its divisors is an integer number (200068687).

Almost surely, 2^400137373 is an apocalyptic number.

It is an amenable number.

400137373 is a deficient number, since it is larger than the sum of its proper divisors (1).

400137373 is an equidigital number, since it uses as much as digits as its factorization.

400137373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 28.

The square root of 400137373 is about 20003.4340301859. The cubic root of 400137373 is about 736.8906378172.

Adding to 400137373 its reverse (373731004), we get a palindrome (773868377).

The spelling of 400137373 in words is "four hundred million, one hundred thirty-seven thousand, three hundred seventy-three".