102406747 has 4 divisors (see below), whose sum is σ = 102562336. Its totient is φ = 102251160.

The previous prime is 102406727. The next prime is 102406757. The reversal of 102406747 is 747604201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747604201 = 3011 ⋅248291.

It is a cyclic number.

It is not a de Polignac number, because 102406747 - 2¹⁵ = 102373979 is a prime.

It is a super-2 number, since 2×102406747² = 20974283662244018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102406727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76803 + ... + 78124.

It is an arithmetic number, because the mean of its divisors is an integer number (25640584).

Almost surely, 2^102406747 is an apocalyptic number.

102406747 is a deficient number, since it is larger than the sum of its proper divisors (155589).

102406747 is an equidigital number, since it uses as much as digits as its factorization.

102406747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155588.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 102406747 is about 10119.6218802878. The cubic root of 102406747 is about 467.8531130695.

The spelling of 102406747 in words is "one hundred two million, four hundred six thousand, seven hundred forty-seven".