642726703 has 2 divisors, whose sum is σ = 642726704. Its totient is φ = 642726702.

The previous prime is 642726691. The next prime is 642726713. The reversal of 642726703 is 307627246.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642726703 - 2⁵ = 642726671 is a prime.

It is a super-2 number, since 2×642726703² = 826195229498500418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642726713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321363351 + 321363352.

It is an arithmetic number, because the mean of its divisors is an integer number (321363352).

Almost surely, 2^642726703 is an apocalyptic number.

642726703 is a deficient number, since it is larger than the sum of its proper divisors (1).

642726703 is an equidigital number, since it uses as much as digits as its factorization.

642726703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 642726703 is about 25352.0552026852. The cubic root of 642726703 is about 862.9959969505.

The spelling of 642726703 in words is "six hundred forty-two million, seven hundred twenty-six thousand, seven hundred three".