40437623 has 2 divisors, whose sum is σ = 40437624. Its totient is φ = 40437622.

The previous prime is 40437619. The next prime is 40437647. The reversal of 40437623 is 32673404.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40437623 - 2² = 40437619 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40437613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20218811 + 20218812.

It is an arithmetic number, because the mean of its divisors is an integer number (20218812).

Almost surely, 2^40437623 is an apocalyptic number.

40437623 is a deficient number, since it is larger than the sum of its proper divisors (1).

40437623 is an equidigital number, since it uses as much as digits as its factorization.

40437623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 29.

The square root of 40437623 is about 6359.0583422390. The cubic root of 40437623 is about 343.2378763961.

The spelling of 40437623 in words is "forty million, four hundred thirty-seven thousand, six hundred twenty-three".