207640451 has 2 divisors, whose sum is σ = 207640452. Its totient is φ = 207640450.

The previous prime is 207640439. The next prime is 207640469. The reversal of 207640451 is 154046702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 207640451 - 2¹⁰ = 207639427 is a prime.

It is a super-2 number, since 2×207640451² = 86229113782966802, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (207640751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103820225 + 103820226.

It is an arithmetic number, because the mean of its divisors is an integer number (103820226).

Almost surely, 2^207640451 is an apocalyptic number.

207640451 is a deficient number, since it is larger than the sum of its proper divisors (1).

207640451 is an equidigital number, since it uses as much as digits as its factorization.

207640451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 207640451 is about 14409.7345915877. The cubic root of 207640451 is about 592.1576185417.

The spelling of 207640451 in words is "two hundred seven million, six hundred forty thousand, four hundred fifty-one".