653401402 has 4 divisors (see below), whose sum is σ = 980102106. Its totient is φ = 326700700.

The previous prime is 653401381. The next prime is 653401453. The reversal of 653401402 is 204104356.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 409698081 + 243703321 = 20241^2 + 15611^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163350349 + ... + 163350352.

Almost surely, 2^653401402 is an apocalyptic number.

653401402 is a deficient number, since it is larger than the sum of its proper divisors (326700704).

653401402 is a wasteful number, since it uses less digits than its factorization.

653401402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326700703.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 653401402 is about 25561.7175088060. The cubic root of 653401402 is about 867.7474657695.

Adding to 653401402 its reverse (204104356), we get a palindrome (857505758).

The spelling of 653401402 in words is "six hundred fifty-three million, four hundred one thousand, four hundred two".