623542747 has 2 divisors, whose sum is σ = 623542748. Its totient is φ = 623542746.

The previous prime is 623542709. The next prime is 623542771. The reversal of 623542747 is 747245326.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 623542747 - 2²³ = 615154139 is a prime.

It is not a weakly prime, because it can be changed into another prime (623540747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311771373 + 311771374.

It is an arithmetic number, because the mean of its divisors is an integer number (311771374).

Almost surely, 2^623542747 is an apocalyptic number.

623542747 is a deficient number, since it is larger than the sum of its proper divisors (1).

623542747 is an equidigital number, since it uses as much as digits as its factorization.

623542747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 40.

The square root of 623542747 is about 24970.8379314752. The cubic root of 623542747 is about 854.3229581985.

The spelling of 623542747 in words is "six hundred twenty-three million, five hundred forty-two thousand, seven hundred forty-seven".