642477007 has 2 divisors, whose sum is σ = 642477008. Its totient is φ = 642477006.

The previous prime is 642476999. The next prime is 642477029. The reversal of 642477007 is 700774246.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642477007 - 2³ = 642476999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642477067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321238503 + 321238504.

It is an arithmetic number, because the mean of its divisors is an integer number (321238504).

Almost surely, 2^642477007 is an apocalyptic number.

642477007 is a deficient number, since it is larger than the sum of its proper divisors (1).

642477007 is an equidigital number, since it uses as much as digits as its factorization.

642477007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 37.

The square root of 642477007 is about 25347.1301531357. The cubic root of 642477007 is about 862.8842259813.

The spelling of 642477007 in words is "six hundred forty-two million, four hundred seventy-seven thousand, seven".